View Code of Problem 22

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
int main(){
    string a,b;
    char c[999];
    int k=0;
    while(cin>>a>>b){
        k=0;
        memset(c,0,sizeof(c));
        for(int i=0;i<a.length();i++){
            for(int j=0;j<b.length();j++){
                if(a[i]==b[j]){
                    c[k++]=a[i];
                    b[j]='*';
                    break;
                }
            }
        }
        sort(c,c+k);
        for(int i=0;i<k;i++){
            cout<<c[i];
        }
        cout<<endl;
    }
    return 0;
}