Uva 10035 - Primary Arithmetic

#include<bits/stdc++.h>

using namespace std;

int main()

{

long a,n,i,j,k,l,ca=0,p,b;

while(cin >> a >> b ){

if (a==0 && b==0) break;

ca=p=0;

while(a!=0 || b!=0){

k = a%10,a/=10,l = b%10,b/=10;

if(k+l+p>9) ca++,p=1;

else p=0;

if ((a==0 || b==0) && p==0) break;

}

if(ca==0)cout<<"No carry operation.";

else if(ca==1)cout<<"1 carry operation.";

else cout<" carry operations."

;

cout<

}

return 0 ;

}