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2",[940,1025,1008],{"class":950},[940,1027,1011],{"class":998},[940,1029,976],{"class":950},[940,1031,1033,1035,1037,1040,1042,1044],{"class":942,"line":1032},6,[940,1034,999],{"class":998},[940,1036,1002],{"class":950},[940,1038,1039],{"class":964}," 3",[940,1041,1008],{"class":950},[940,1043,1011],{"class":998},[940,1045,976],{"class":950},[940,1047,1049,1051,1053,1056,1058,1060],{"class":942,"line":1048},7,[940,1050,999],{"class":998},[940,1052,1002],{"class":950},[940,1054,1055],{"class":964}," 4",[940,1057,1008],{"class":950},[940,1059,1011],{"class":998},[940,1061,976],{"class":950},[940,1063,1065,1067,1069,1072,1074,1076],{"class":942,"line":1064},8,[940,1066,999],{"class":998},[940,1068,1002],{"class":950},[940,1070,1071],{"class":964}," 5",[940,1073,1008],{"class":950},[940,1075,1011],{"class":998},[940,1077,976],{"class":950},[940,1079,1081,1083,1085,1088,1090,1092],{"class":942,"line":1080},9,[940,1082,999],{"class":998},[940,1084,1002],{"class":950},[940,1086,1087],{"class":964}," 6",[940,1089,1008],{"class":950},[940,1091,1011],{"class":998},[940,1093,976],{"class":950},[940,1095,1097,1099,1101,1104,1106,1108],{"class":942,"line":1096},10,[940,1098,999],{"class":998},[940,1100,1002],{"class":950},[940,1102,1103],{"class":964}," 7",[940,1105,1008],{"class":950},[940,1107,1011],{"class":998},[940,1109,976],{"class":950},[940,1111,1113,1115,1117,1120,1122,1124],{"class":942,"line":1112},11,[940,1114,999],{"class":998},[940,1116,1002],{"class":950},[940,1118,1119],{"class":964}," 8",[940,1121,1008],{"class":950},[940,1123,1011],{"class":998},[940,1125,976],{"class":950},[940,1127,1129,1131,1133,1136,1138,1140],{"class":942,"line":1128},12,[940,1130,999],{"class":998},[940,1132,1002],{"class":950},[940,1134,1135],{"class":964}," 9",[940,1137,1008],{"class":950},[940,1139,1011],{"class":998},[940,1141,976],{"class":950},[940,1143,1145,1147,1149,1152,1154,1156],{"class":942,"line":1144},13,[940,1146,999],{"class":998},[940,1148,1002],{"class":950},[940,1150,1151],{"class":964}," 10",[940,1153,1008],{"class":950},[940,1155,1011],{"class":998},[940,1157,976],{"class":950},[940,1159,1161,1163,1165,1168,1170,1172],{"class":942,"line":1160},14,[940,1162,999],{"class":998},[940,1164,1002],{"class":950},[940,1166,1167],{"class":964}," 11",[940,1169,1008],{"class":950},[940,1171,1011],{"class":998},[940,1173,976],{"class":950},[940,1175,1177,1179,1181,1184,1186,1188],{"class":942,"line":1176},15,[940,1178,999],{"class":998},[940,1180,1002],{"class":950},[940,1182,1183],{"class":964}," 12",[940,1185,1008],{"class":950},[940,1187,1011],{"class":998},[940,1189,976],{"class":950},[940,1191,1193,1195,1197,1200,1202,1204],{"class":942,"line":1192},16,[940,1194,999],{"class":998},[940,1196,1002],{"class":950},[940,1198,1199],{"class":964}," 13",[940,1201,1008],{"class":950},[940,1203,1011],{"class":998},[940,1205,976],{"class":950},[940,1207,1209,1211,1213,1216,1218,1220],{"class":942,"line":1208},17,[940,1210,999],{"class":998},[940,1212,1002],{"class":950},[940,1214,1215],{"class":964}," 14",[940,1217,1008],{"class":950},[940,1219,1011],{"class":998},[940,1221,976],{"class":950},[940,1223,1225,1227,1229,1232,1234,1236],{"class":942,"line":1224},18,[940,1226,999],{"class":998},[940,1228,1002],{"class":950},[940,1230,1231],{"class":964}," 15",[940,1233,1008],{"class":950},[940,1235,1011],{"class":998},[940,1237,976],{"class":950},[940,1239,1241,1243,1245,1248,1250,1252],{"class":942,"line":1240},19,[940,1242,999],{"class":998},[940,1244,1002],{"class":950},[940,1246,1247],{"class":964}," 16",[940,1249,1008],{"class":950},[940,1251,1011],{"class":998},[940,1253,976],{"class":950},[940,1255,1257,1259,1261,1264,1266,1268],{"class":942,"line":1256},20,[940,1258,999],{"class":998},[940,1260,1002],{"class":950},[940,1262,1263],{"class":964}," 17",[940,1265,1008],{"class":950},[940,1267,1011],{"class":998},[940,1269,976],{"class":950},[940,1271,1273,1275,1277,1280,1282,1284],{"class":942,"line":1272},21,[940,1274,999],{"class":998},[940,1276,1002],{"class":950},[940,1278,1279],{"class":964}," 18",[940,1281,1008],{"class":950},[940,1283,1011],{"class":998},[940,1285,976],{"class":950},[940,1287,1289,1291,1293,1296,1298,1300],{"class":942,"line":1288},22,[940,1290,999],{"class":998},[940,1292,1002],{"class":950},[940,1294,1295],{"class":964}," 19",[940,1297,1008],{"class":950},[940,1299,1011],{"class":998},[940,1301,976],{"class":950},[940,1303,1305,1307,1309,1312,1314,1316],{"class":942,"line":1304},23,[940,1306,999],{"class":998},[940,1308,1002],{"class":950},[940,1310,1311],{"class":964}," 20",[940,1313,1008],{"class":950},[940,1315,1011],{"class":998},[940,1317,976],{"class":950},[940,1319,1321],{"class":942,"line":1320},24,[940,1322,1323],{"class":950},"}\n",[940,1325,1327],{"class":942,"line":1326},25,[940,1328,1329],{"class":998},"``\n",[940,1331,1333],{"class":942,"line":1332},26,[940,1334,1335],{"class":998},"但是这样真的很繁琐乏味，复制粘贴都得折腾半天。这个时候，循环就派上了用场。看看这段代码。\n",[940,1337,1339],{"class":942,"line":1338},27,[940,1340,1342],{"emptyLinePlaceholder":1341},true,"\n",[940,1344,1346],{"class":942,"line":1345},28,[940,1347,1348],{"class":998},"```cpp codemo\n",[940,1350,1352,1354,1356,1358],{"class":942,"line":1351},29,[940,1353,947],{"class":946},[940,1355,951],{"class":950},[940,1357,955],{"class":954},[940,1359,958],{"class":950},[940,1361,1363,1365,1367,1369],{"class":942,"line":1362},30,[940,1364,965],{"class":964},[940,1366,969],{"class":968},[940,1368,973],{"class":972},[940,1370,976],{"class":950},[940,1372,1374,1376,1378,1380],{"class":942,"line":1373},31,[940,1375,982],{"class":968},[940,1377,986],{"class":985},[940,1379,989],{"class":950},[940,1381,992],{"class":950},[940,1383,1385,1388,1391,1394,1397],{"class":942,"line":1384},32,[940,1386,1387],{"class":968},"    int",[940,1389,1390],{"class":998}," a",[940,1392,1393],{"class":950},"{",[940,1395,1396],{"class":964},"1",[940,1398,1399],{"class":950},"};\n",[940,1401,1403,1406,1409,1412,1415,1417,1420],{"class":942,"line":1402},33,[940,1404,1405],{"class":946},"    while",[940,1407,1408],{"class":950}," (",[940,1410,1411],{"class":998},"a ",[940,1413,1414],{"class":950},"\u003C=",[940,1416,1311],{"class":964},[940,1418,1419],{"class":950},")",[940,1421,992],{"class":950},[940,1423,1425,1429,1431,1434,1436,1438],{"class":942,"line":1424},34,[940,1426,1428],{"class":1427},"swJcz","        cout ",[940,1430,1002],{"class":950},[940,1432,1433],{"class":1427}," a ",[940,1435,1002],{"class":950},[940,1437,1011],{"class":1427},[940,1439,976],{"class":950},[940,1441,1443,1446,1449,1451,1454,1456],{"class":942,"line":1442},35,[940,1444,1445],{"class":1427},"        a ",[940,1447,1448],{"class":950},"=",[940,1450,1433],{"class":1427},[940,1452,1453],{"class":950},"+",[940,1455,1005],{"class":964},[940,1457,976],{"class":950},[940,1459,1461],{"class":942,"line":1460},36,[940,1462,1463],{"class":950},"    }\n",[940,1465,1467],{"class":942,"line":1466},37,[940,1468,1323],{"class":950},[927,1470,1471,1472,1475,1476,1479,1480,1482],{},"嗯……这个 ",[922,1473,1474],{},"int a{1};"," 我们明白，是声明并定义整数变量 ",[922,1477,1478],{},"a"," 为 ",[922,1481,1396],{}," 的意思——然后是什么鬼？",[927,1484,1485,1486,1489,1490,1493,1494,1496,1497,1500,1501,1503,1504,1506,1507,1510],{},"这个 ",[922,1487,1488],{},"while(a \u003C= 20)"," 的意思就是“当 ",[922,1491,1492],{},"a \u003C= 20"," 这个条件成立的时候，不断地做……”不断地做什么？就是做后面大括号括起来的内容啦。看到后面大括号括起来的两行分别是“输出 ",[922,1495,1478],{}," 的值”和“把 ",[922,1498,1499],{},"a + 1"," 的结果赋值给 ",[922,1502,1478],{}," 自己”，因此整个意思就是当 ",[922,1505,1478],{}," 小于等于 ",[922,1508,1509],{},"20"," 的时候，不断地做输出、赋值、输出、赋值……这样的操作。",[927,1512,1513],{},"这样就够了吗？没错。你可以尝试运行这段代码，可以得到我们想要的结果。为什么这样就是正确的呢？我们一步步模拟一下计算机在运行的时候会发生什么：",[1515,1516,1517,1526,1535,1544,1559,1565,1577,1582,1601,1607,1618,1621,1624,1627,1638,1649,1663,1669],"ul",{},[1518,1519,1520,1521,1479,1523,1525],"li",{},"首先我们在第 4 行声明并定义了一个整数变量 ",[922,1522,1478],{},[922,1524,1396],{}," 。",[1518,1527,1528,1529,1531,1532,1534],{},"然后到了 ",[922,1530,924],{}," 。 ",[922,1533,1492],{}," 这个条件满足吗？1 比 20 小，当然满足。因此应该开始执行大括号里面的内容——",[1518,1536,1537,1538,1540,1541,1543],{},"大括号里面第一行输出了 ",[922,1539,1478],{}," 的值——输出了 ",[922,1542,1396],{}," 。这是我们想要输出的第一个数。",[1518,1545,1546,1547,1549,1550,1553,1554,1556,1557,1525],{},"然后执行赋值：式子 ",[922,1548,1499],{}," 的结果是 ",[922,1551,1552],{},"2"," ，因此这个赋值相当于把 ",[922,1555,1478],{}," 的值变成 ",[922,1558,1552],{},[1518,1560,1561,1562,1564],{},"因为是不断地执行这两行内容，所以应该回到开头……不过在此之前需要检查一下 ",[922,1563,1492],{}," 这个条件是否还满足。如果不满足的话，就不再执行了。",[1518,1566,1567,1568,1570,1571,1573,1574,1576],{},"检查 ",[922,1569,1492],{}," 这个条件。很好， ",[922,1572,1478],{}," 现在是 ",[922,1575,1552],{}," ，满足条件。那么继续执行输出和赋值。",[1518,1578,1579,1580,1525],{},"输出 ",[922,1581,1552],{},[1518,1583,1584,1585,1587,1588,1591,1592,1594,1595,1597,1598,1600],{},"赋值：式子 ",[922,1586,1499],{}," 的结果为 ",[922,1589,1590],{},"3"," ，因此赋值之后 ",[922,1593,1478],{}," 的值变成了 ",[922,1596,1590],{}," 。（每次赋值实际上就是 ",[922,1599,1478],{}," 自增 1。）",[1518,1602,1603,1604,1606],{},"在继续下一次“轮回”之前检查条件，发现条件 ",[922,1605,1492],{}," 仍然满足。于是继续执行……",[1518,1608,1579,1609,1611,1612,1614,1615,1525],{},[922,1610,1590],{}," ，赋值之后 ",[922,1613,1478],{}," 变成了 ",[922,1616,1617],{},"4",[1518,1619,1620],{},"继续一直这样做下去……",[1518,1622,1623],{},"……",[1518,1625,1626],{},"…",[1518,1628,1629,1630,1633,1634,1614,1636,1525],{},"现在输出了 ",[922,1631,1632],{},"19"," ，然后赋值之后 ",[922,1635,1478],{},[922,1637,1509],{},[1518,1639,1640,1641,1643,1644,1479,1646,1648],{},"好，检查条件来决定是否继续循环： ",[922,1642,1492],{}," 它成立吗？因为是小于等于，所以当 ",[922,1645,1478],{},[922,1647,1509],{}," 时条件也满足。因此仍然进入循环——",[1518,1650,1579,1651,1653,1654,1656,1657,1659,1660,1525],{},[922,1652,1478],{}," 的值 ",[922,1655,1509],{}," 。然后进行赋值；和原来一样， ",[922,1658,1478],{}," 赋值后增加了 1，变成了 ",[922,1661,1662],{},"21",[1518,1664,1665,1666,1668],{},"现在再来检查条件来决定是否继续不断地执行： ",[922,1667,1492],{}," ……好像不成立了；21 比 20 要大。因此循环不再继续。",[1518,1670,1671],{},"现在我们刚好输出了从 1 到 20 的全部自然数。",[1673,1674,1675],"script",{"setup":936},"\nimport \"@src\u002Fch03\u002Ffig.css\";\n",[1677,1678,1679,1683],"details",{},[1680,1681,1682],"summary",{},"显示动画",[1684,1685,1689],"div",{"className":1686,"style":1688},[1687],"fig","height: 650px; overflow: hidden",[1690,1691,1696],"iframe",{"width":1692,"height":1693,"frameBorder":1694,"src":1695},800,500,"0","http:\u002F\u002Fpythontutor.com\u002Fiframe-embed.html#code=%23include%20%3Ciostream%3E%0Ausing%20namespace%20std%3B%0Aint%20main%28%29%20%7B%0A%20%20%20%20int%20a%7B1%7D%3B%0A%20%20%20%20while%20%28a%20%3C%3D%2020%29%20%7B%0A%20%20%20%20%20%20%20%20cout%20%3C%3C%20a%20%3C%3C%20endl%3B%0A%20%20%20%20%20%20%20%20a%20%3D%20a%20%2B%201%3B%0A%20%20%20%20%7D%0A%7D%0A&codeDivHeight=400&codeDivWidth=350&cumulative=false&curInstr=2&heapPrimitives=nevernest&origin=opt-frontend.js&py=cpp&rawInputLstJSON=%5B%5D&textReferences=false"," ",[927,1698,1699],{},"循环是一个非常强大的工具。有了循环，基本上许多问题都可以一定程度上得到解决。最后我用一张图来总结循环：",[1701,1702,1704],"table",{"style":1703},"float: left",[1705,1706,1707],"tbody",{},[1708,1709,1710],"tr",{},[1711,1712,1713,1714],"td",{},"\n    ",[931,1715,1716,1720,1721,1724,1725,1728,1729],{},[1717,1718,1719],"em",{},"开始","\nwhile (",[1717,1722,1723],{},"条件",") {\n    ",[1717,1726,1727],{},"不断要做的事情","\n}\n",[1717,1730,1731],{},"结束",[931,1733,1737],{"className":1734,"code":1735,"language":1736,"meta":936,"style":936},"language-flow shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","st=>start: 开始\ne=>end: 结束\nbd=>operation: 不断要做的事情\ncond=>condition: 条件成立？\n\nst->cond\ncond(yes)->bd\nbd(left)->cond\ncond(no)->e\n","flow",[922,1738,1739,1744,1749,1754,1759,1763,1768,1773,1778],{"__ignoreMap":936},[940,1740,1741],{"class":942,"line":943},[940,1742,1743],{},"st=>start: 开始\n",[940,1745,1746],{"class":942,"line":961},[940,1747,1748],{},"e=>end: 结束\n",[940,1750,1751],{"class":942,"line":979},[940,1752,1753],{},"bd=>operation: 不断要做的事情\n",[940,1755,1756],{"class":942,"line":995},[940,1757,1758],{},"cond=>condition: 条件成立？\n",[940,1760,1761],{"class":942,"line":1016},[940,1762,1342],{"emptyLinePlaceholder":1341},[940,1764,1765],{"class":942,"line":1032},[940,1766,1767],{},"st->cond\n",[940,1769,1770],{"class":942,"line":1048},[940,1771,1772],{},"cond(yes)->bd\n",[940,1774,1775],{"class":942,"line":1064},[940,1776,1777],{},"bd(left)->cond\n",[940,1779,1780],{"class":942,"line":1080},[940,1781,1782],{},"cond(no)->e\n",[1784,1785,1786],"blockquote",{},[927,1787,1788,1789,1791,1792,1795,1796,1798,1799,1801],{},"除了 ",[922,1790,924],{}," 循环之外，还有许多种其它的循环；其中更常见的是 ",[922,1793,1794],{},"for"," 循环。但是任何其它的循环都可以简单地转换为 ",[922,1797,924],{}," 循环，因此现阶段只需理解 ",[922,1800,924],{}," 循环就足够了。",[918,1803,1804],{"id":1804},"练习",[1806,1807,1808,1811,1814],"ol",{},[1518,1809,1810],{},"尝试编写一个程序，使其输出 1 到 20 的偶数。请使用循环。",[1518,1812,1813],{},"尝试编写一个程序，求出 1 到 20 之间所有奇数的和。",[1518,1815,1816,1817,1821],{},"想一想，怎样编写一个无限循环的程序？试着写出来。（提示：如果你要运行它，请注意：按下 ",[1818,1819,1820],"kbd",{},"Ctrl + C"," 键可以强制退出程序的运行。）",[918,1823,1824],{"id":1824},"练习参考答案",[931,1826,1828],{"className":933,"code":1827,"language":935,"meta":936,"style":936},"#include \u003Ciostream>\nusing namespace std;\nint main() {\n    int a{2};\n    while (a \u003C= 20) {\n        cout \u003C\u003C a \u003C\u003C endl;\n        a = a + 2;\n    }\n}\n",[922,1829,1830,1840,1850,1860,1872,1888,1902,1916,1920],{"__ignoreMap":936},[940,1831,1832,1834,1836,1838],{"class":942,"line":943},[940,1833,947],{"class":946},[940,1835,951],{"class":950},[940,1837,955],{"class":954},[940,1839,958],{"class":950},[940,1841,1842,1844,1846,1848],{"class":942,"line":961},[940,1843,965],{"class":964},[940,1845,969],{"class":968},[940,1847,973],{"class":972},[940,1849,976],{"class":950},[940,1851,1852,1854,1856,1858],{"class":942,"line":979},[940,1853,982],{"class":968},[940,1855,986],{"class":985},[940,1857,989],{"class":950},[940,1859,992],{"class":950},[940,1861,1862,1864,1866,1868,1870],{"class":942,"line":995},[940,1863,1387],{"class":968},[940,1865,1390],{"class":998},[940,1867,1393],{"class":950},[940,1869,1552],{"class":964},[940,1871,1399],{"class":950},[940,1873,1874,1876,1878,1880,1882,1884,1886],{"class":942,"line":1016},[940,1875,1405],{"class":946},[940,1877,1408],{"class":950},[940,1879,1411],{"class":998},[940,1881,1414],{"class":950},[940,1883,1311],{"class":964},[940,1885,1419],{"class":950},[940,1887,992],{"class":950},[940,1889,1890,1892,1894,1896,1898,1900],{"class":942,"line":1032},[940,1891,1428],{"class":1427},[940,1893,1002],{"class":950},[940,1895,1433],{"class":1427},[940,1897,1002],{"class":950},[940,1899,1011],{"class":1427},[940,1901,976],{"class":950},[940,1903,1904,1906,1908,1910,1912,1914],{"class":942,"line":1048},[940,1905,1445],{"class":1427},[940,1907,1448],{"class":950},[940,1909,1433],{"class":1427},[940,1911,1453],{"class":950},[940,1913,1023],{"class":964},[940,1915,976],{"class":950},[940,1917,1918],{"class":942,"line":1064},[940,1919,1463],{"class":950},[940,1921,1922],{"class":942,"line":1080},[940,1923,1323],{"class":950},[931,1925,1927],{"className":933,"code":1926,"language":935,"meta":936,"style":936},"#include \u003Ciostream>\nusing namespace std;\nint main() {\n    int a{1};\n    int s{0};\n    while (a \u003C= 20) {\n        s = s + a;\n        a = a + 2;\n    }\n    cout \u003C\u003C s \u003C\u003C endl;\n}\n",[922,1928,1929,1939,1949,1959,1971,1984,2000,2016,2030,2034,2048],{"__ignoreMap":936},[940,1930,1931,1933,1935,1937],{"class":942,"line":943},[940,1932,947],{"class":946},[940,1934,951],{"class":950},[940,1936,955],{"class":954},[940,1938,958],{"class":950},[940,1940,1941,1943,1945,1947],{"class":942,"line":961},[940,1942,965],{"class":964},[940,1944,969],{"class":968},[940,1946,973],{"class":972},[940,1948,976],{"class":950},[940,1950,1951,1953,1955,1957],{"class":942,"line":979},[940,1952,982],{"class":968},[940,1954,986],{"class":985},[940,1956,989],{"class":950},[940,1958,992],{"class":950},[940,1960,1961,1963,1965,1967,1969],{"class":942,"line":995},[940,1962,1387],{"class":968},[940,1964,1390],{"class":998},[940,1966,1393],{"class":950},[940,1968,1396],{"class":964},[940,1970,1399],{"class":950},[940,1972,1973,1975,1978,1980,1982],{"class":942,"line":1016},[940,1974,1387],{"class":968},[940,1976,1977],{"class":998}," s",[940,1979,1393],{"class":950},[940,1981,1694],{"class":964},[940,1983,1399],{"class":950},[940,1985,1986,1988,1990,1992,1994,1996,1998],{"class":942,"line":1032},[940,1987,1405],{"class":946},[940,1989,1408],{"class":950},[940,1991,1411],{"class":998},[940,1993,1414],{"class":950},[940,1995,1311],{"class":964},[940,1997,1419],{"class":950},[940,1999,992],{"class":950},[940,2001,2002,2005,2007,2010,2012,2014],{"class":942,"line":1048},[940,2003,2004],{"class":1427},"        s ",[940,2006,1448],{"class":950},[940,2008,2009],{"class":1427}," s ",[940,2011,1453],{"class":950},[940,2013,1390],{"class":1427},[940,2015,976],{"class":950},[940,2017,2018,2020,2022,2024,2026,2028],{"class":942,"line":1064},[940,2019,1445],{"class":1427},[940,2021,1448],{"class":950},[940,2023,1433],{"class":1427},[940,2025,1453],{"class":950},[940,2027,1023],{"class":964},[940,2029,976],{"class":950},[940,2031,2032],{"class":942,"line":1080},[940,2033,1463],{"class":950},[940,2035,2036,2038,2040,2042,2044,2046],{"class":942,"line":1096},[940,2037,999],{"class":998},[940,2039,1002],{"class":950},[940,2041,2009],{"class":998},[940,2043,1002],{"class":950},[940,2045,1011],{"class":998},[940,2047,976],{"class":950},[940,2049,2050],{"class":942,"line":1112},[940,2051,1323],{"class":950},[931,2053,2055],{"className":933,"code":2054,"language":935,"meta":936,"style":936},"#include \u003Ciostream>\nusing namespace std;\nint main() {\n    while (2 > 1) {\n        cout \u003C\u003C \"Loop forever...\" \u003C\u003C endl;\n    }\n}\n",[922,2056,2057,2067,2077,2087,2104,2125,2129],{"__ignoreMap":936},[940,2058,2059,2061,2063,2065],{"class":942,"line":943},[940,2060,947],{"class":946},[940,2062,951],{"class":950},[940,2064,955],{"class":954},[940,2066,958],{"class":950},[940,2068,2069,2071,2073,2075],{"class":942,"line":961},[940,2070,965],{"class":964},[940,2072,969],{"class":968},[940,2074,973],{"class":972},[940,2076,976],{"class":950},[940,2078,2079,2081,2083,2085],{"class":942,"line":979},[940,2080,982],{"class":968},[940,2082,986],{"class":985},[940,2084,989],{"class":950},[940,2086,992],{"class":950},[940,2088,2089,2091,2093,2095,2098,2100,2102],{"class":942,"line":995},[940,2090,1405],{"class":946},[940,2092,1408],{"class":950},[940,2094,1552],{"class":964},[940,2096,2097],{"class":950}," >",[940,2099,1005],{"class":964},[940,2101,1419],{"class":950},[940,2103,992],{"class":950},[940,2105,2106,2108,2110,2113,2116,2119,2121,2123],{"class":942,"line":1016},[940,2107,1428],{"class":1427},[940,2109,1002],{"class":950},[940,2111,2112],{"class":950}," \"",[940,2114,2115],{"class":954},"Loop forever...",[940,2117,2118],{"class":950},"\"",[940,2120,1008],{"class":950},[940,2122,1011],{"class":1427},[940,2124,976],{"class":950},[940,2126,2127],{"class":942,"line":1032},[940,2128,1463],{"class":950},[940,2130,2131],{"class":942,"line":1048},[940,2132,1323],{"class":950},[1784,2134,2135],{},[927,2136,2137,2138,2142],{},"没有输出的无限循环可能导致",[1478,2139,2141],{"href":2140},"\u002Fch02\u002Fpart2\u002Fincdec_operator#%E6%9C%AA%E5%AE%9A%E4%B9%89%E8%A1%8C%E4%B8%BA","未定义行为","。",[2144,2145,2146],"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 .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .sBMFI, html code.shiki .sBMFI{--shiki-light:#E2931D;--shiki-default:#FFCB6B;--shiki-dark:#FFCB6B}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: 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循环",{"id":1804,"depth":961,"text":1804},{"id":1824,"depth":961,"text":1824},"md",null,{},{"icon":58},{"title":85,"description":85},"YxvS8ax_r_zwsySNLe4BG86zio_-uttLG7CClXfN7_0",[2160,2162],{"title":81,"path":82,"stem":83,"description":2161,"icon":58,"children":-1},"咱们来写一个猜数的游戏。",{"title":89,"path":90,"stem":91,"description":2163,"icon":58,"children":-1},"上一章讲述了如何输出一句话和输出一个数（整数或小数）。",1784618091173]