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",[940,1017,1018],{"class":950},">>",[940,1020,1002],{"class":1001},[940,1022,976],{"class":950},[940,1024,1026,1029,1031],{"class":942,"line":1025},6,[940,1027,1028],{"class":946},"    return",[940,1030,1002],{"class":1001},[940,1032,976],{"class":950},[940,1034,1036,1038],{"class":942,"line":1035},7,[940,1037,928],{"class":950},[940,1039,1040],{"class":1008}," \u002F\u002F 变量名 n 的作用域结束\n",[940,1042,1044,1046,1049,1051],{"class":942,"line":1043},8,[940,1045,982],{"class":968},[940,1047,1048],{"class":985}," main",[940,1050,989],{"class":950},[940,1052,992],{"class":950},[940,1054,1056],{"class":942,"line":1055},9,[940,1057,1058],{"class":1008},"    \u002F\u002F 这里显然不能再使用 getInput 函数里的变量了\n",[940,1060,1062,1064,1067,1070,1073,1076],{"class":942,"line":1061},10,[940,1063,998],{"class":968},[940,1065,1066],{"class":1001}," x",[940,1068,1069],{"class":950},"{",[940,1071,1072],{"class":985},"getInput",[940,1074,1075],{"class":950},"()};",[940,1077,1078],{"class":1008}," \u002F\u002F 变量名 x 的作用域开始\n",[940,1080,1082,1085,1088,1091,1093,1096],{"class":942,"line":1081},11,[940,1083,1084],{"class":1001},"    cout ",[940,1086,1087],{"class":950},"\u003C\u003C",[940,1089,1090],{"class":1001}," x ",[940,1092,1087],{"class":950},[940,1094,1095],{"class":1001}," endl",[940,1097,976],{"class":950},[940,1099,1101,1103],{"class":942,"line":1100},12,[940,1102,928],{"class":950},[940,1104,1105],{"class":1008}," \u002F\u002F 变量名 x 的作用域结束\n",[922,1107,1108],{},"所以我们做不到只通过这种形式让一个变量贯穿多个函数。比如：",[931,1110,1112],{"className":933,"code":1111,"language":935,"meta":936,"style":936},"#include \u003Ciostream>\nusing namespace std;\nvoid change(int a, int b) {\n    a = 30;\n    b = 50;\n}\nint main() {\n    int a{3}, b{5};\n    change(a, b);\n    cout \u003C\u003C a \u003C\u003C \" \" \u003C\u003C b \u003C\u003C endl;\n}\n",[926,1113,1114,1124,1134,1165,1178,1190,1195,1205,1229,1246,1274],{"__ignoreMap":936},[940,1115,1116,1118,1120,1122],{"class":942,"line":943},[940,1117,947],{"class":946},[940,1119,951],{"class":950},[940,1121,955],{"class":954},[940,1123,958],{"class":950},[940,1125,1126,1128,1130,1132],{"class":942,"line":961},[940,1127,965],{"class":964},[940,1129,969],{"class":968},[940,1131,973],{"class":972},[940,1133,976],{"class":950},[940,1135,1136,1139,1142,1145,1147,1151,1154,1157,1160,1163],{"class":942,"line":979},[940,1137,1138],{"class":968},"void",[940,1140,1141],{"class":985}," change",[940,1143,1144],{"class":950},"(",[940,1146,982],{"class":968},[940,1148,1150],{"class":1149},"sHdIc"," a",[940,1152,1153],{"class":950},",",[940,1155,1156],{"class":968}," int",[940,1158,1159],{"class":1149}," b",[940,1161,1162],{"class":950},")",[940,1164,992],{"class":950},[940,1166,1167,1170,1173,1176],{"class":942,"line":995},[940,1168,1169],{"class":1001},"    a ",[940,1171,1172],{"class":950},"=",[940,1174,1175],{"class":964}," 30",[940,1177,976],{"class":950},[940,1179,1180,1183,1185,1188],{"class":942,"line":1012},[940,1181,1182],{"class":1001},"    b ",[940,1184,1172],{"class":950},[940,1186,1187],{"class":964}," 50",[940,1189,976],{"class":950},[940,1191,1192],{"class":942,"line":1025},[940,1193,1194],{"class":950},"}\n",[940,1196,1197,1199,1201,1203],{"class":942,"line":1035},[940,1198,982],{"class":968},[940,1200,1048],{"class":985},[940,1202,989],{"class":950},[940,1204,992],{"class":950},[940,1206,1207,1209,1211,1213,1216,1219,1221,1223,1226],{"class":942,"line":1043},[940,1208,998],{"class":968},[940,1210,1150],{"class":1001},[940,1212,1069],{"class":950},[940,1214,1215],{"class":964},"3",[940,1217,1218],{"class":950},"},",[940,1220,1159],{"class":1001},[940,1222,1069],{"class":950},[940,1224,1225],{"class":964},"5",[940,1227,1228],{"class":950},"};\n",[940,1230,1231,1234,1236,1239,1241,1243],{"class":942,"line":1055},[940,1232,1233],{"class":985},"    change",[940,1235,1144],{"class":950},[940,1237,1238],{"class":1001},"a",[940,1240,1153],{"class":950},[940,1242,1159],{"class":1001},[940,1244,1245],{"class":950},");\n",[940,1247,1248,1250,1252,1255,1257,1260,1262,1265,1268,1270,1272],{"class":942,"line":1061},[940,1249,1084],{"class":1001},[940,1251,1087],{"class":950},[940,1253,1254],{"class":1001}," a ",[940,1256,1087],{"class":950},[940,1258,1259],{"class":950}," \"",[940,1261,1259],{"class":950},[940,1263,1264],{"class":950}," \u003C\u003C",[940,1266,1267],{"class":1001}," b ",[940,1269,1087],{"class":950},[940,1271,1095],{"class":1001},[940,1273,976],{"class":950},[940,1275,1276],{"class":942,"line":1081},[940,1277,1194],{"class":950},[922,1279,1280,1281,1284,1285,1287,1288,1291,1292,1295,1296,1287,1298,1300,1301,1304],{},"这个例子和上一节提到的 ",[926,1282,1283],{},"change"," 函数完全相同。唯一不一样的地方是 change 函数形参的名字换成了 ",[926,1286,1238],{}," 和 ",[926,1289,1290],{},"b","，但是这样并没有任何区别。尽管它现在和 ",[926,1293,1294],{},"main"," 函数里的 ",[926,1297,1238],{},[926,1299,1290],{}," 名字相同，但是由于它们在各自的函数作用域内，所以互不干扰。同时上一节的图示也表明，两个函数的变量分别存储在各自的空间内，没有交集。所以这段代码编译运行的结果仍然为 ",[926,1302,1303],{},"3 5","。",[922,1306,1307],{},"需要注意的一点是，对于函数形参名字，尽管它的声明点不在函数体内，但它的作用域仍然持续到函数体结束（废话，不然函数内就用不了了）。",[918,1309,1310],{"id":1310},"全局作用域",[922,1312,1313,1314,1317,1318,1304],{},"整个 C++ 代码最顶层的作用域被称为全局命名空间作用域（Global namespace scope），简称",[1315,1316,1310],"strong",{},"。对于目前说，那些不声明于任何一个函数内的名字——即外层没有任何包裹它的名字，都是全局作用域的。比如 main 函数就定义在全局作用域内。如果一个名字拥有全局作用域，则它的作用域起始于声明点，结束于整个代码",[1315,1319,1320],{},"文件的结尾",[922,1322,1323],{},"变量名也可以拥有全局作用域。比如：",[931,1325,1327],{"className":933,"code":1326,"language":935,"meta":936,"style":936},"#include \u003Ciostream>\nusing namespace std;\nint a{42}, b{56};\nint main() {\n    cout \u003C\u003C a \u003C\u003C \" \" \u003C\u003C b \u003C\u003C endl;\n}\n",[926,1328,1329,1339,1349,1371,1381,1405],{"__ignoreMap":936},[940,1330,1331,1333,1335,1337],{"class":942,"line":943},[940,1332,947],{"class":946},[940,1334,951],{"class":950},[940,1336,955],{"class":954},[940,1338,958],{"class":950},[940,1340,1341,1343,1345,1347],{"class":942,"line":961},[940,1342,965],{"class":964},[940,1344,969],{"class":968},[940,1346,973],{"class":972},[940,1348,976],{"class":950},[940,1350,1351,1353,1355,1357,1360,1362,1364,1366,1369],{"class":942,"line":979},[940,1352,982],{"class":968},[940,1354,1150],{"class":1001},[940,1356,1069],{"class":950},[940,1358,1359],{"class":964},"42",[940,1361,1218],{"class":950},[940,1363,1159],{"class":1001},[940,1365,1069],{"class":950},[940,1367,1368],{"class":964},"56",[940,1370,1228],{"class":950},[940,1372,1373,1375,1377,1379],{"class":942,"line":995},[940,1374,982],{"class":968},[940,1376,1048],{"class":985},[940,1378,989],{"class":950},[940,1380,992],{"class":950},[940,1382,1383,1385,1387,1389,1391,1393,1395,1397,1399,1401,1403],{"class":942,"line":1012},[940,1384,1084],{"class":1001},[940,1386,1087],{"class":950},[940,1388,1254],{"class":1001},[940,1390,1087],{"class":950},[940,1392,1259],{"class":950},[940,1394,1259],{"class":950},[940,1396,1264],{"class":950},[940,1398,1267],{"class":1001},[940,1400,1087],{"class":950},[940,1402,1095],{"class":1001},[940,1404,976],{"class":950},[940,1406,1407],{"class":942,"line":1025},[940,1408,1194],{"class":950},[922,1410,1411,1412,1287,1414,1416],{},"其中，变量 ",[926,1413,1238],{},[926,1415,1290],{}," 的名字就拥有全局作用域。全局作用域和函数作用域最大的不同就在于，任何函数都可以使用全局作用域的名字。比如：",[931,1418,1420],{"className":933,"code":1419,"language":935,"meta":936,"style":936},"#include \u003Ciostream>\nusing namespace std;\nint a, b;\nvoid change() {\n    a = 30;\n    b = 50;\n}\nint main() {\n    a = 3;\n    b = 5;\n    change();\n    cout \u003C\u003C a \u003C\u003C \" \" \u003C\u003C b \u003C\u003C endl;\n}\n",[926,1421,1422,1432,1442,1454,1464,1474,1484,1488,1498,1509,1520,1527,1551],{"__ignoreMap":936},[940,1423,1424,1426,1428,1430],{"class":942,"line":943},[940,1425,947],{"class":946},[940,1427,951],{"class":950},[940,1429,955],{"class":954},[940,1431,958],{"class":950},[940,1433,1434,1436,1438,1440],{"class":942,"line":961},[940,1435,965],{"class":964},[940,1437,969],{"class":968},[940,1439,973],{"class":972},[940,1441,976],{"class":950},[940,1443,1444,1446,1448,1450,1452],{"class":942,"line":979},[940,1445,982],{"class":968},[940,1447,1150],{"class":1001},[940,1449,1153],{"class":950},[940,1451,1159],{"class":1001},[940,1453,976],{"class":950},[940,1455,1456,1458,1460,1462],{"class":942,"line":995},[940,1457,1138],{"class":968},[940,1459,1141],{"class":985},[940,1461,989],{"class":950},[940,1463,992],{"class":950},[940,1465,1466,1468,1470,1472],{"class":942,"line":1012},[940,1467,1169],{"class":1001},[940,1469,1172],{"class":950},[940,1471,1175],{"class":964},[940,1473,976],{"class":950},[940,1475,1476,1478,1480,1482],{"class":942,"line":1025},[940,1477,1182],{"class":1001},[940,1479,1172],{"class":950},[940,1481,1187],{"class":964},[940,1483,976],{"class":950},[940,1485,1486],{"class":942,"line":1035},[940,1487,1194],{"class":950},[940,1489,1490,1492,1494,1496],{"class":942,"line":1043},[940,1491,982],{"class":968},[940,1493,1048],{"class":985},[940,1495,989],{"class":950},[940,1497,992],{"class":950},[940,1499,1500,1502,1504,1507],{"class":942,"line":1055},[940,1501,1169],{"class":1001},[940,1503,1172],{"class":950},[940,1505,1506],{"class":964}," 3",[940,1508,976],{"class":950},[940,1510,1511,1513,1515,1518],{"class":942,"line":1061},[940,1512,1182],{"class":1001},[940,1514,1172],{"class":950},[940,1516,1517],{"class":964}," 5",[940,1519,976],{"class":950},[940,1521,1522,1524],{"class":942,"line":1081},[940,1523,1233],{"class":985},[940,1525,1526],{"class":950},"();\n",[940,1528,1529,1531,1533,1535,1537,1539,1541,1543,1545,1547,1549],{"class":942,"line":1100},[940,1530,1084],{"class":1001},[940,1532,1087],{"class":950},[940,1534,1254],{"class":1001},[940,1536,1087],{"class":950},[940,1538,1259],{"class":950},[940,1540,1259],{"class":950},[940,1542,1264],{"class":950},[940,1544,1267],{"class":1001},[940,1546,1087],{"class":950},[940,1548,1095],{"class":1001},[940,1550,976],{"class":950},[940,1552,1554],{"class":942,"line":1553},13,[940,1555,1194],{"class":950},[922,1557,1558,1559,1561,1562,1287,1564,1566,1567,1569,1570,1287,1572,1574],{},"这里的 ",[926,1560,1283],{}," 函数就很自然地使用了全局作用域的名字 ",[926,1563,1238],{},[926,1565,1290],{},"。你会发现这段代码和之前一样仍然试图通过 ",[926,1568,1283],{}," 函数来更改变量 ",[926,1571,1238],{},[926,1573,1290],{}," 的值，不过前两次都失败了。来看看这次能行得通吗？",[1576,1577,1580],"div",{"className":1578},[1579],"fig",[1576,1581],{"id":1582,"className":1583},"fig1",[1584],"raphael",[922,1586,1587,1588,1591,1592,1595,1596,1598],{},"我们称那些名字是全局作用域的变量为",[1315,1589,1590],{},"全局变量","，名字不是全局作用域的变量为",[1315,1593,1594],{},"局部变量","。所以，函数体内声明并定义的变量是局部变量，形参也是局部变量。通过全局变量，我们终于能够让 ",[926,1597,1283],{}," 函数“永久”改变变量的值了。",[1600,1601,1602],"blockquote",{},[922,1603,1604,1605,1608],{},"有关一个变量存储的位置、分配内存和初始化的时机是存储期的相关知识。在",[1238,1606,1607],{"href":363},"链表章节","会有更多介绍。",[1600,1610,1611],{},[922,1612,1613],{},"一个很显然的事实是，全局作用域内定义的变量要么没有初始化器，要么必然是常量初始化的。因为它们的初始化发生在最早期，初始化值必然只能在编译期间确定。",[922,1615,1616],{},"最后用一个例子来总结我们学过的作用域：",[931,1618,1620],{"className":933,"code":1619,"language":935,"meta":936,"style":936},"#include \u003Ciostream>                \u002F\u002F    作用域\nusing namespace std;               \u002F\u002F ==============\nint excelNumber{0};                \u002F\u002F excelNumber  ┐\nvoid excelCount(double score) {    \u002F\u002F score  ┐     │\n    if (score > 85) {              \u002F\u002F        │     │\n        excelNumber++;             \u002F\u002F        │     │\n    }                              \u002F\u002F        │     │\n}                                  \u002F\u002F score  ┘     │\nint main() {                       \u002F\u002F              │\n    double score{0.0};             \u002F\u002F score  ┐     │\n    for (int i{0}; i \u003C 100; i++) { \u002F\u002F i  ┐   │     │\n        cin >> score;              \u002F\u002F    │   │     │\n        excelCount(score);         \u002F\u002F    │   │     │\n    }                              \u002F\u002F i  ┘   │     │\n}                                  \u002F\u002F score  ┘     │\n                                   \u002F\u002F excelNumber  ┘\n",[926,1621,1622,1636,1649,1667,1690,1713,1725,1733,1740,1753,1770,1810,1824,1840,1848,1855],{"__ignoreMap":936},[940,1623,1624,1626,1628,1630,1633],{"class":942,"line":943},[940,1625,947],{"class":946},[940,1627,951],{"class":950},[940,1629,955],{"class":954},[940,1631,1632],{"class":950},">",[940,1634,1635],{"class":1008},"                \u002F\u002F    作用域\n",[940,1637,1638,1640,1642,1644,1646],{"class":942,"line":961},[940,1639,965],{"class":964},[940,1641,969],{"class":968},[940,1643,973],{"class":972},[940,1645,1005],{"class":950},[940,1647,1648],{"class":1008},"               \u002F\u002F ==============\n",[940,1650,1651,1653,1656,1658,1661,1664],{"class":942,"line":979},[940,1652,982],{"class":968},[940,1654,1655],{"class":1001}," excelNumber",[940,1657,1069],{"class":950},[940,1659,1660],{"class":964},"0",[940,1662,1663],{"class":950},"};",[940,1665,1666],{"class":1008},"                \u002F\u002F excelNumber  ┐\n",[940,1668,1669,1671,1674,1676,1679,1682,1684,1687],{"class":942,"line":995},[940,1670,1138],{"class":968},[940,1672,1673],{"class":985}," excelCount",[940,1675,1144],{"class":950},[940,1677,1678],{"class":968},"double",[940,1680,1681],{"class":1149}," score",[940,1683,1162],{"class":950},[940,1685,1686],{"class":950}," {",[940,1688,1689],{"class":1008},"    \u002F\u002F score  ┐     │\n",[940,1691,1692,1695,1698,1701,1703,1706,1708,1710],{"class":942,"line":1012},[940,1693,1694],{"class":946},"    if",[940,1696,1697],{"class":950}," (",[940,1699,1700],{"class":1001},"score ",[940,1702,1632],{"class":950},[940,1704,1705],{"class":964}," 85",[940,1707,1162],{"class":950},[940,1709,1686],{"class":950},[940,1711,1712],{"class":1008},"              \u002F\u002F        │     │\n",[940,1714,1715,1719,1722],{"class":942,"line":1025},[940,1716,1718],{"class":1717},"swJcz","        excelNumber",[940,1720,1721],{"class":950},"++;",[940,1723,1724],{"class":1008},"             \u002F\u002F        │     │\n",[940,1726,1727,1730],{"class":942,"line":1035},[940,1728,1729],{"class":950},"    }",[940,1731,1732],{"class":1008},"                              \u002F\u002F        │     │\n",[940,1734,1735,1737],{"class":942,"line":1043},[940,1736,928],{"class":950},[940,1738,1739],{"class":1008},"                                  \u002F\u002F score  ┘     │\n",[940,1741,1742,1744,1746,1748,1750],{"class":942,"line":1055},[940,1743,982],{"class":968},[940,1745,1048],{"class":985},[940,1747,989],{"class":950},[940,1749,1686],{"class":950},[940,1751,1752],{"class":1008},"                       \u002F\u002F              │\n",[940,1754,1755,1758,1760,1762,1765,1767],{"class":942,"line":1061},[940,1756,1757],{"class":968},"    double",[940,1759,1681],{"class":1001},[940,1761,1069],{"class":950},[940,1763,1764],{"class":964},"0.0",[940,1766,1663],{"class":950},[940,1768,1769],{"class":1008},"             \u002F\u002F score  ┐     │\n",[940,1771,1772,1775,1777,1779,1782,1784,1786,1788,1791,1794,1797,1799,1802,1805,1807],{"class":942,"line":1081},[940,1773,1774],{"class":946},"    for",[940,1776,1697],{"class":950},[940,1778,982],{"class":968},[940,1780,1781],{"class":1001}," i{",[940,1783,1660],{"class":964},[940,1785,928],{"class":1001},[940,1787,1005],{"class":950},[940,1789,1790],{"class":1001}," i ",[940,1792,1793],{"class":950},"\u003C",[940,1795,1796],{"class":964}," 100",[940,1798,1005],{"class":950},[940,1800,1801],{"class":1001}," i",[940,1803,1804],{"class":950},"++)",[940,1806,1686],{"class":950},[940,1808,1809],{"class":1008}," \u002F\u002F i  ┐   │     │\n",[940,1811,1812,1815,1817,1819,1821],{"class":942,"line":1100},[940,1813,1814],{"class":1717},"        cin ",[940,1816,1018],{"class":950},[940,1818,1681],{"class":1717},[940,1820,1005],{"class":950},[940,1822,1823],{"class":1008},"              \u002F\u002F    │   │     │\n",[940,1825,1826,1829,1831,1834,1837],{"class":942,"line":1553},[940,1827,1828],{"class":985},"        excelCount",[940,1830,1144],{"class":950},[940,1832,1833],{"class":1717},"score",[940,1835,1836],{"class":950},");",[940,1838,1839],{"class":1008},"         \u002F\u002F    │   │     │\n",[940,1841,1843,1845],{"class":942,"line":1842},14,[940,1844,1729],{"class":950},[940,1846,1847],{"class":1008},"                              \u002F\u002F i  ┘   │     │\n",[940,1849,1851,1853],{"class":942,"line":1850},15,[940,1852,928],{"class":950},[940,1854,1739],{"class":1008},[940,1856,1858],{"class":942,"line":1857},16,[940,1859,1860],{"class":1008},"                                   \u002F\u002F excelNumber  ┘\n",[922,1862,1863,1864,1867,1868,1870],{},"其中 ",[926,1865,1866],{},"excelNumber"," 是全局变量，而其它的都是局部变量。两个函数中的 ",[926,1869,1833],{}," 互不相同，这一点我们之前已经有所了解了。",[922,1872,1873,1874,1878],{},"类似地，当局部变量与全局变量同名时，会发生",[1238,1875,1877],{"href":1876},"\u002Fch02\u002Fpart3\u002Fscope#%E5%90%8D%E5%AD%97%E7%9A%84%E9%9A%90%E8%97%8F","名字的隐藏","。这时，全局变量会被局部变量屏蔽。",[918,1880,1881],{"id":1881},"注意事项",[922,1883,1884,1885,1888],{},"第一，",[1315,1886,1887],{},"C++ 要求函数的定义不能出现在函数体内","。就是说，目前而言函数只能定义在全局作用域——即函数定义不能出现在函数体里。所以下面的代码是错误的：",[931,1890,1892],{"className":933,"code":1891,"language":935,"meta":936,"style":936},"int f() {\n    int g() {\n        \u002F\u002F 嵌套定义是不被允许的，会导致编译错误\n    }\n}\n",[926,1893,1894,1905,1916,1921,1926],{"__ignoreMap":936},[940,1895,1896,1898,1901,1903],{"class":942,"line":943},[940,1897,982],{"class":968},[940,1899,1900],{"class":985}," f",[940,1902,989],{"class":950},[940,1904,992],{"class":950},[940,1906,1907,1909,1912,1914],{"class":942,"line":961},[940,1908,998],{"class":968},[940,1910,1911],{"class":985}," g",[940,1913,989],{"class":950},[940,1915,992],{"class":950},[940,1917,1918],{"class":942,"line":979},[940,1919,1920],{"class":1008},"        \u002F\u002F 嵌套定义是不被允许的，会导致编译错误\n",[940,1922,1923],{"class":942,"line":995},[940,1924,1925],{"class":950},"    }\n",[940,1927,1928],{"class":942,"line":1012},[940,1929,1194],{"class":950},[922,1931,1932],{},"同时，我们不建议将不含定义的函数声明写在函数体内部。",[931,1934,1936],{"className":933,"code":1935,"language":935,"meta":936,"style":936},"int f() {\n    int g(); \u002F\u002F 不推荐\n}\n",[926,1937,1938,1948,1960],{"__ignoreMap":936},[940,1939,1940,1942,1944,1946],{"class":942,"line":943},[940,1941,982],{"class":968},[940,1943,1900],{"class":985},[940,1945,989],{"class":950},[940,1947,992],{"class":950},[940,1949,1950,1952,1954,1957],{"class":942,"line":961},[940,1951,998],{"class":968},[940,1953,1911],{"class":985},[940,1955,1956],{"class":950},"();",[940,1958,1959],{"class":1008}," \u002F\u002F 不推荐\n",[940,1961,1962],{"class":942,"line":979},[940,1963,1194],{"class":950},[922,1965,1966,1967,1970],{},"第二，",[1315,1968,1969],{},"C++ 规定函数的形参不能是数组","。为什么？这是一个历史遗留问题，这里也给不出什么具体的解释。不过你如果强行把数组放在形参的位置上也不是不行——",[931,1972,1974],{"className":933,"code":1973,"language":935,"meta":936,"style":936},"#include \u003Ciostream>\nusing namespace std;\nvoid change(int a[2]) {\n    a[0] = 30;\n    a[1] = 50;\n}\nint main() {\n    int a[2]{3, 5};\n    change(a);\n    cout \u003C\u003C a[0] \u003C\u003C \" \" \u003C\u003C a[1] \u003C\u003C endl;\n}\n",[926,1975,1976,1986,1996,2019,2038,2055,2059,2069,2090,2100,2136],{"__ignoreMap":936},[940,1977,1978,1980,1982,1984],{"class":942,"line":943},[940,1979,947],{"class":946},[940,1981,951],{"class":950},[940,1983,955],{"class":954},[940,1985,958],{"class":950},[940,1987,1988,1990,1992,1994],{"class":942,"line":961},[940,1989,965],{"class":964},[940,1991,969],{"class":968},[940,1993,973],{"class":972},[940,1995,976],{"class":950},[940,1997,1998,2000,2002,2004,2006,2008,2011,2014,2017],{"class":942,"line":979},[940,1999,1138],{"class":968},[940,2001,1141],{"class":985},[940,2003,1144],{"class":950},[940,2005,982],{"class":968},[940,2007,1150],{"class":1149},[940,2009,2010],{"class":950},"[",[940,2012,2013],{"class":964},"2",[940,2015,2016],{"class":950},"])",[940,2018,992],{"class":950},[940,2020,2021,2024,2026,2028,2031,2034,2036],{"class":942,"line":995},[940,2022,2023],{"class":1001},"    a",[940,2025,2010],{"class":950},[940,2027,1660],{"class":964},[940,2029,2030],{"class":950},"]",[940,2032,2033],{"class":950}," =",[940,2035,1175],{"class":964},[940,2037,976],{"class":950},[940,2039,2040,2042,2044,2047,2049,2051,2053],{"class":942,"line":1012},[940,2041,2023],{"class":1001},[940,2043,2010],{"class":950},[940,2045,2046],{"class":964},"1",[940,2048,2030],{"class":950},[940,2050,2033],{"class":950},[940,2052,1187],{"class":964},[940,2054,976],{"class":950},[940,2056,2057],{"class":942,"line":1025},[940,2058,1194],{"class":950},[940,2060,2061,2063,2065,2067],{"class":942,"line":1035},[940,2062,982],{"class":968},[940,2064,1048],{"class":985},[940,2066,989],{"class":950},[940,2068,992],{"class":950},[940,2070,2071,2073,2075,2077,2079,2082,2084,2086,2088],{"class":942,"line":1043},[940,2072,998],{"class":968},[940,2074,1150],{"class":1001},[940,2076,2010],{"class":950},[940,2078,2013],{"class":964},[940,2080,2081],{"class":950},"]{",[940,2083,1215],{"class":964},[940,2085,1153],{"class":950},[940,2087,1517],{"class":964},[940,2089,1228],{"class":950},[940,2091,2092,2094,2096,2098],{"class":942,"line":1055},[940,2093,1233],{"class":985},[940,2095,1144],{"class":950},[940,2097,1238],{"class":1001},[940,2099,1245],{"class":950},[940,2101,2102,2104,2106,2108,2110,2112,2114,2116,2118,2120,2122,2124,2126,2128,2130,2132,2134],{"class":942,"line":1061},[940,2103,1084],{"class":1001},[940,2105,1087],{"class":950},[940,2107,1150],{"class":1001},[940,2109,2010],{"class":950},[940,2111,1660],{"class":964},[940,2113,2030],{"class":950},[940,2115,1264],{"class":950},[940,2117,1259],{"class":950},[940,2119,1259],{"class":950},[940,2121,1264],{"class":950},[940,2123,1150],{"class":1001},[940,2125,2010],{"class":950},[940,2127,2046],{"class":964},[940,2129,2030],{"class":950},[940,2131,1264],{"class":950},[940,2133,1095],{"class":1001},[940,2135,976],{"class":950},[940,2137,2138],{"class":942,"line":1081},[940,2139,1194],{"class":950},[922,2141,2142,2143,2147],{},"就像这样。但是你会发现运行的结果貌似和我们预想的有所偏差……具体的原因我们会留到",[1238,2144,2146],{"href":2145},"\u002Fch04\u002Fpointer\u002Fpointer_and_array#%E6%95%B0%E7%BB%84%E5%88%B0%E6%8C%87%E9%92%88%E7%9A%84%E8%BD%AC%E6%8D%A2","指针章节","再做讲解。",[1600,2149,2150,2153],{},[922,2151,2152],{},"除此之外，C++ 还有以下限制：",[2154,2155,2156,2160,2163],"ul",{},[2157,2158,2159],"li",{},"函数的返回值不能是数组。",[2157,2161,2162],{},"函数的参数不能是函数。",[2157,2164,2165],{},"函数的返回值不能是函数。",[2167,2168,2169],"script",{"setup":936},"\nimport { fig1 } from \"@src\u002Fch03\u002Fscope_again\";\nimport { onMounted } from \"vue\";\nonMounted(() => {\n    const [fig1e, fig1t] = [\n        \"#fig1\",\n        \"#fig1Text\",\n    ].map((s) => document.querySelector(s));\n    fig1(fig1e, fig1t);\n});\n",[2171,2172,2173],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .sbssI, html code.shiki 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var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}",{"title":936,"searchDepth":943,"depth":961,"links":2175},[2176,2177,2178],{"id":920,"depth":961,"text":920},{"id":1310,"depth":961,"text":1310},{"id":1881,"depth":961,"text":1881},"我们一直以来都将变量定义在函数的函数体里。","md",null,{},{"icon":232},{"title":264,"description":2179},"nUw_DG-VNcwqLZGwBNbyPJ3XeWkSyLM1U_ZXirDSZfk",[2187,2189],{"title":260,"path":261,"stem":262,"description":2188,"icon":232,"children":-1},"学习了函数之后，我们终于可以完整地介绍 C++ 程序的结构了。",{"title":93,"path":268,"stem":269,"description":2190,"icon":232,"children":-1},"本章总结",1784618095093]