CPE 4. Primary Arithmetic

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

int main(){
    int a,b;
    while(cin>>a>>b){
        int count=0;
        int add=0;
        if(a!=0&&b!=0){
            while(a>1||b>1){
                if(a%10+b%10+add>=10){
                  count=count+1;
                  add=1;
                }
                else{
                  add=0;
                }
                a=a/10;
                b=b/10;
            }
            if(count==0){
            cout<<"No carry operation."<<endl;
            }
            else if(count==1){
            cout<<"1 carry operation."<<endl;
            }
            else{
            cout<<count<<" carry operations."<<endl;
            }

        }

    }

}