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Please input two integers 與The larger number is ？

C++

森林海 2022-12-22 17:13:23

#include "stdafx.h"#include <iostream>using namespace std;int _tmain(int argc, _TCHAR* argv[]){int a, b;do{while (1){cout << "Please input two integers ：";cin >> a >> b;if ((int)a != a || (int)b != b){cout << "Aren't you input two integers,please try again" << endl;continue;}else break;}if (a > b)cout << "The larger number is " << a << endl;elsecout << "The larger number is " << b << endl;} while (a = b);return 0;}執(zhí)行之后如果輸入的不是整數(shù)就會重復(fù)輸出Please input two integers 與The larger number is這是為啥

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3 回答

倚天杖

TA貢獻1828條經(jīng)驗獲得超3個贊

在C++中，while函數(shù)有兩種使用方式：

1、while(條件，起始條件，i++)

{循環(huán)函數(shù)體；}

----適用判斷條件很明確，而且函數(shù)的執(zhí)行次數(shù)也非常明確的情形

----先判斷條件，然后執(zhí)行循環(huán)體

2、do

{函數(shù)體；

i++;}

while (條件)；

----適用判斷條件明確，但函數(shù)執(zhí)行次數(shù)不明確的情形

----先執(zhí)行循環(huán)體，再判斷條件是否可以繼續(xù)執(zhí)行

分別舉例，通過while和do-while來計算 1+2+3+……+100：

反對回復(fù) 2022-12-25

Cats萌萌

TA貢獻1805條經(jīng)驗獲得超9個贊

注釋的地方改一下就可以了，

12345678910111213141516171819202122232425262728 #include <iostream>using namespace std;int main(){ double a, b;//定義改一下 do { while (1) { cout << "Please input two integers ："; cin >> a >> b; if ((int)a != a || (int)b != b) { cout << "Aren't you input two integers,please try again" << endl; continue; } else break; } if (a > b) cout << "The larger number is " << a << endl; else cout << "The larger number is " << b << endl; } while (a == b);//改成== system("pause"); return 0;}