输入流

Question

#include <iostream>
using namespace std;

int main(){
	int a=0;
	char ch[90];
	while (1){
		cin >> a;
		cout << "int：" << a << endl;
		cin >> ch;
		cout << "char：" << ch << endl;
	}
}

这个是怎么发生的？是C++库没处理好吗？

Answer 1

导致整个原因是因为您在cin>>a;的时候，输入的是erty55，而a是int类型，这样导致cin输入流的状态被破坏，所以后面的输入操作都不正确。您可以在cin>>a之后加上cin.good()来判断一下返回值是true还是false。
if(!cin.good()) break;

如果您将您的第一个输入修改成55erty，应该就没有问题了。

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Visual C++ enthusiast, like network programming and driver development. At present is being engaged in the WinCE/Windows Mobile platform embedded development.

Answer 2

我是故意把char 输入int 的，具体是破坏成怎样的呢？

Answer 3

设断点F11调试进去，这样你可能知道发生了什么。

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