1 #include<stdio.h> 2 #include<math.h> 3 int main() 4 { 5 int n; 6 double x1,x2,y1,y2; 7 scanf("%d",&n); 8 while(n--) 9 { 10 scanf("%lf%lf%lf%lf",&x1,&y1,&x2,&y2); 11 printf("%.2lf\n",sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2))); 12 } 13 }
原文：http://www.cnblogs.com/qq188380780/p/6236422.html