NYOJ 102、111

NYOJ 102 

 #include<stdio.h>
 #include<math.h>
 int main()
 {
     int n;
     double x1,y1,x2,y2,dis;
     scanf("%d",&n);
     while(n--)
     {
         scanf("%lf %lf %lf %lf",&x1,&y1,&x2,&y2);
         dis=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
         printf("%.2f\n",dis);
     }
     return 0;
 }

NYOJ 111

# include <stdio.h>
# include <math.h>
# include <stdlib.h>
 int pact(int m,int n)
 {
   int r; r=m%n;
   while(r)
   {
       m=n;
       n=r;
       r=m%n;
   }
    return n;
 }
 int main()
 {
 char s[8];
 int a,b,c,d,m,h,n,k;
 char o;
 while(scanf("%s",s)!=EOF)
 {
     a=s[0]-'0';
     b=s[2]-'0';
     c=s[4]-'0';
     d=s[6]-'0';
     o=s[3];
     if(o=='+') m=a*d+b*c;
       else  m=a*d-b*c;
     n=b*d;
     k=pact(abs(m),n);
     if(k==n) printf("%d\n",m/k);
     else printf("%d/%d\n",m/k,n/k);

}
 return 0;
 }