isprint（）导致exe崩溃 [英] isprint() is leads to exe crashing

问题描述

我正在使用isprint（）来查看能否打印的字符。



我正在传递像'μTorrent'这样的输入它的车载...（μ ）



但其他输入工作正常..

I am using isprint()to check the char able to print or not.

I am passing the input like 'µTorrent' Its carshing .. (µ)

But other inputs its working fine..

char *cpTemp = new char[str_Input.length()+1];   //str_Input i am having the input string
sprintf(cpTemp, "%s", str_Input.c_str());
int nLength = str_Input.length();

while(nLength)
{
	char cTemp = *cpTemp;
	if(isprint(cTemp))
	{
	}
	
}

推荐答案

这是符号扩展字符大于0x7F的结果。请尝试使用以下代码：

This is the result of sign extending characters greater than 0x7F. Try the following code instead:

for (string::iterator it = str_Input.begin(); it < str_Input.end(); it++)
{
	unsigned char cTemp = *it;
	if(isprint(cTemp))
	{
		cout << cTemp << " is printable" << endl;
	}
	
}

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