程序代码：

#include <stdio.h>
#include<math.h>
typedef struct
{
    int x,y;
}POINT2D;
int main()
{
    POINT2D p1,p2;
    char c;
    scanf("%d/%d",&p1.x,&p1.y);
    scanf("%d/%d",&p2.x,&p2.y);
    if(p1.x*p2.y>p1.y*p2.x)
    {
        c='>';
    }
    else if(p1.x*p2.y<p1.y*p2.x)
    {
        c='<';
    }
    else
    {
        c='=';
    }
    printf("%d/%d %c %d/%d\n",p1.x,p1.y,c,p2.x,p2.y);
    return 0;
}

程序代码：

#include <stdio.h>
#include<math.h>
typedef struct
{
    int x,y;
}POINT2D;
int main()
{
    POINT2D p1,p2;
    int a;
    char c;
    scanf("%d/%d",&p1.x,&p1.y);
    scanf("%d/%d",&p2.x,&p2.y);
    a=p1.x*p2.y-p1.y*p2.x;
    if(a>0)
    {
        c='>';
    }
    else if(a<0)
    {
       c='<';
    }
    else
    {
         c='=';
    }
    printf("%d/%d %c %d/%d\n",p1.x,p1.y,c,p2.x,p2.y);
    return 0;
}