南阳111

 1 #include<stdio.h>
 2 
 3 int cus(int x,int y)
 4 {
 5     if(y)
 6         return cus(y,x%y);
 7     else
 8         return x;
 9 }
10 int main()
11 {
12     int x1,x2,y1,y2;
13     char c;
14     while(~scanf("%d/%d%c%d/%d",&x1,&x2,&c,&y1,&y2))
15     {
16         if(c=='+')
17             x1=(x1*y2)+(y1*x2);
18         else
19             x1=(x1*y2)-(y1*x2);
20         x2*=y2;
21         y1=x1>0?x1:-x1;
22         y2=cus(x2,y1);
23         x1/=y2,x2/=y2;
24         if(!x1)
25             puts("0");
26         else if(x1%x2)
27             printf("%d/%d\n",x1,x2);
28         else
29             printf("%d\n",x1/x2);
30     }
31 }

 

转载于:https://www.cnblogs.com/qq188380780/p/6242401.html