UVa 10035 Primary Arithmetic

Code：

#include<stdio.h>

#include<stdlib.h>

#include<iostream>

#include<algorithm>

#include<string.h>

#include<string>

#include<math.h>

using namespace std;

int fdigit(int n)

{

    return n%10;

}

int main()

{

    int a,b;

    while(cin>>a>>b && (a!=0||b!=0))

    {

        int ans=0,add=0;

        for(int i=0;i<=10;i++)

        {

            int n1=fdigit(a),n2=fdigit(b);          

            a/=10,b/=10;

            if(n1+n2+add>=10) ans+=1,add=1;

            else add=0;

        }

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

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

        else cout<<ans<<" carry operations."<<endl;

    }

    return 0;

}