[bo][un]csy19881122[/un] 在 2008-10-29 18:44 的发言：[/bo]

要是想化简，就在后面加一个取公约数的代码。

[bo][un]tfg0116[/un] 在 2008-10-29 22:31 的发言：[/bo]

#include<iostream>
using namespace std;

class Fract
{
    int num;
    int den;
public:
        Fract(int a = 0, int b = 1)
        {
            num = a;
            den = b;
        }
    int gcd(int m, int n)
    {
        int r;
        if(m < n)
        {
            r = m;
            m = n;
            n = r;
        }
        while(r = m%n)
        {
            m = n;
            n = r;
        }
        return n;
    }
    Fract add(Fract f);
    void show()
    {
        cout<<num<<"/"<<den<<endl;
    }
};
Fract Fract::add(Fract f)
{
    Fract sum;
    sum.den = den * f.den;
    sum.num = f.den*num + den*f.num;
    int x = gcd(sum.num, sum.den);
    sum.num = sum.num/x;
    sum.den = sum.den/x;
    return sum;
}
void main()
{
    int x , y, i, j;
    cout<<"Enter x , y, i, j:"<<endl;
    cin>>x>>y>>i>>j;
    Fract f1(x, y), f2(i, j), f3;
    f3 = f1.add(f2);
    f3.show();
}