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cin处理错误输入(clear,ignore,sync)
阅读量:609 次
发布时间:2019-03-12

本文共 312 字,大约阅读时间需要 1 分钟。

当代码是输入整数,而实际输入是非法字符(如字母)时,程序就会挂掉。

这时需要重置cin标识和清空缓冲区才行。

示例:

cin >> r >> c;	if (!cin) //当输入失败(比如输入的不是整数)时,必须先重置cin,然后手动清空cin的缓冲区,然后才能重新输入	{		cin.clear(); //这2个函数用来处理错误输入		cin.ignore();//清空cin缓存区		//cin.sync();		return play0();	}

clear函数是清空cin标识的,cin标识是输入错误时产生的,要手动清除才能继续输入。

ignore和sync函数都可以用来清空缓冲区,这2个函数有区别,但是区别不大。

转载地址:http://cpoxz.baihongyu.com/

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