c++ 计算字符串长度

#include<iostream>
#include<string>

//int StrLen(char const str[])
//{
//	int i;
//	for(i=0;str[i] != ""; ++i)
//		continue;
//	return i;
//}

int StrLen(char const * pStr)
{
	char const *p = pStr;
	while(*p++)
		std::cout << *p << std::endl;
		;
	return p -pStr - 1;
	
}

int main()
{
	char aString[] = "the long string";
    int len = StrLen(aString);
	//std::string aString = "the long string";
	std::cout << "The lengh of " << aString <<" is " << len << std::endl;
}