调用函数两点间的距离.c

#include<stdio.h>

#include<math.h>

double dist(double x1,double y1,double x2,double y2);

int main()

{

double result,x1,x2,y1,y2;

scanf("%lf%lf%lf%lf",&x1,&y1,&x2,&y2);

result=dist(x1,y1,x2,y2);

printf("%.2f",result);

return 0;

}

double dist(double x1,double y1,double x2,double y2)

{

double sum,x,y;

x=fabs(x1-x2);

y=fabs(y1-y2);

sum=sqrt(x*x+y*y);

return sum;

}