1050 String Subtraction

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给2个字符串，要求输出S1-S2，结果不能出现S2中出现的字符。

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#include <iostream>
#include <string.h>
using namespace std;

char s1[10001], s2[10001];
int main() {
    cin.getline(s1, 10001);
    cin.getline(s2, 10001);
    int len1 = strlen(s1);
    int len2 = strlen(s2);
    bool ASCII[300] = {false};
    for (int i = 0; i< len2; i++) {
        ASCII[s2[i]] = true;
    }
    for (int i = 0; i < len1; i++) {
        if (ASCII[s1[i]] == false) {
            printf("%c", s1[i]);
        }
    }

    return 0;
}

// 因为输入会有空格，所以用cin.getline()来读取一行，用scanf遇到空格会停止

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Thy r stdnts.