각 자리의수 합 구하기 예제

Number.cpp

 

#include<iostream>
using namespace std;

class Number{
private:
        int num;
        int sum;
public:
        Number(){num=15;}
        Number(int a){num=a;}
        void calcSum();
        void print(){cout<<"숫자 : "<<num<<", 합 : "<<sum<<endl;}
};
void Number::calcSum()
{        sum=0;
        int b=num;
        while(b>0)
        {
                sum+=(b%10);
                b=b/10;
        }
}

void main()
{
        int input;
        cout<<"숫자 : ";
        cin>>input;

        Number my(input);
        my.calcSum();
        my.print();
}