View Code of Problem 22

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
int main(){
    char a[999],b[999],c[999];
    while(cin>>a>>b){
        int k=0;
        for(int i=0;i<strlen(a);i++){
            for(int j=0;j<strlen(b);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;
}


/*
Main.cc: In function 'int main()':
Main.cc:9:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i=0;i<strlen(a);i++){
                      ^
Main.cc:10:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int j=0;j<strlen(b);j++){
                          ^
Main.cc:18:19: error: 'sort' was not declared in this scope
         sort(c,c+k);
                   ^
*/