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return 0; 的意思就是退出函數(shù)并返回調(diào)用函數(shù)。
?當(dāng)程序得到一個(gè)結(jié)果已經(jīng)無(wú)需再往下執(zhí)行的的時(shí)候 或者程序員自己想判斷函數(shù)執(zhí)行出錯(cuò)想退出的時(shí)候執(zhí)行 return 0操作; 也可以return 1或其他的值 由程序員自己定義 在調(diào)用函數(shù)的地方可以取得反回值進(jìn)行判斷 就能知道函數(shù)執(zhí)行的情況。