最近碰到了一个stringstream和char联合使用的奇怪bug,  本文不具体说这个bug.


       来看看程序:

#include <iostream>
#include <string>
#include <sstream>
using namespace std;

void test(const string &s1, const string &s2)
{
	cout << s1 << endl;
	cout << s2 << endl;
	if(s1 == s2)
	{
		cout << "yes" << endl;
	}
	else
	{
		cout << "no" << endl;
	}
}

int main()
{
	int c1 = '6';
	stringstream ss1;
	ss1 << c1;

	char c2 = '6';
	stringstream ss2;
	ss2 << c2;

	test(ss1.str(), ss2.str());

	return 0;
}
     结果:

54
6
no


     呵呵, 要小心啊。 再看:

#include <iostream>
#include <string>
#include <sstream>
using namespace std;

void test(int x, int y)
{
	cout << x << endl;
	cout << y << endl;

	if(x == y)
	{
		cout << "yes" << endl;
	}
	else
	{
		cout << "no" << endl;
	}
}

int main()
{
	stringstream ss;
	ss << 2;

	int c1;
	ss >> c1;

	char c2;
	ss >> c1;

	test(c1, c2);

	return 0;
}
      结果:

2
0
no


      小心。




本文转载:CSDN博客