View Code of Problem 22

#include<bits/stdc++.h>
using namespace std;

int main(void)
{
  int i;
  vector <int> alpha1(26,0),alpha2(26,0);
  string s1,s2;
  while(cin>>s1>>s2)
  {
    for(i=0;i<s1.size();++i)
      alpha1[s1[i]-'a']=1;
    for(ii=0;i<s2.size();++i)
      alpha2[s2[i]-'a']=1;
    for(i=0;i<26;++i)
      if(alpha1[i]==1&&alpha2[i]==1)
        printf("%c",'a'+i);
    cout<<endl;
    alpha1.clear();
    alpha2.clear();
  }
}
/*
Main.cc: In function 'int main()':
Main.cc:11:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
     for(i=0;i<s1.size();++i)
             ~^~~~~~~~~~
Main.cc:13:9: error: 'ii' was not declared in this scope
     for(ii=0;i<s2.size();++i)
         ^~
Main.cc:13:9: note: suggested alternative: 'i'
     for(ii=0;i<s2.size();++i)
         ^~
         i
Main.cc:13:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
     for(ii=0;i<s2.size();++i)
              ~^~~~~~~~~~
*/