String Subtraction (20)

注意：

字符串輸入可能會有空格，用getline(cin, string);

代碼：

#include "iostream"
#include "vector"
#include "string"
#include "cstring"
#include "queue"
#include "map"
#include "cstdio"
#include <limits.h>
using namespace std;

int main()
{
	string s1;
	string s2;
	getline(cin, s1);
	getline(cin, s2);
	for (int i = 0; i < s1.size(); i++)
	{
		int j = 0;
		for (; j < s2.size(); j++)
		{
			if (s1[i] == s2[j])
				break;
		}
		if (j == s2.size())
			cout << s1[i];
	}

}