字符串a-b

 1 #include<iostream>
 2 #include<stdio.h>
 3 #include<algorithm>
 4 #include<cmath>
 5 #include<string.h>
 6 #include<string>
 7 using namespace std;
 8 int main() 
 9 {
10     int zz[10010];
11     string z;
12     string w;
13     getline(cin, z);
14     getline(cin, w);
15     for (int i = 0; i < w.length(); i++) 
16     {
17         zz[w[i]] = 1;
18     }
19     for (int i = 0; i < z.length(); i++) 
20     {
21         if (zz[z[i]] == 1) 
22         {
23             continue;
24         }
25         cout << z[i];
26     }
27     cout << endl;
28     return 0;
29 }

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转载自www.cnblogs.com/fengzhongzhuifeng/p/10732934.html
A-B