C011:分数相加

代码：

#include "stdafx.h"

int _tmain(int argc, _TCHAR* argv[])
{
    int up1,down1,up2,down2;

    do{
        printf("Enter two fractions seperated by a plus sign:");
        scanf("%d/%d+%d/%d",&up1,&down1,&up2,&down2);
        int down3=down1*down2;
        int up3=up1*down2+up2*down1;

        int small=(up3<down3)?up3:down3;
        int gcd;
        for(;small>;small--){
            if(up3%small== && down3%small==)
            {
                gcd=small;
                break;
            }
        }

        printf("The sum is %d/%d\n",up3/gcd,down3/gcd);
    }while(up1!=);

    return ;
}

代码：

Enter two fractions seperated by a plus sign:/+/
The sum is /
Enter two fractions seperated by a plus sign:/+/
The sum is /
Enter two fractions seperated by a plus sign:/+/
The sum is /
Enter two fractions seperated by a plus sign:/+/
The sum is /
Enter two fractions seperated by a plus sign:/+/
The sum is /

--2020年6月9日--