1050. String Subtraction (20)

#include <iostream>
#include <string.h>using namespace std;int flag[130];
char s[2][10010];int main()
{int i, len[2];for(i = 0; i <= 1; i++){gets(s[i]);len[i] = strlen(s[i]);}for(i = 0; i < len[1]; i++){flag[s[1][i]] = 1;}char ch;for(i = 0; i < len[0]; i++){ch = s[0][i];if(flag[ch] == 0){printf("%c", ch);}}printf("\n");system("pause");return 0;
}