Question

c语言平面两点间距离

#include<stdio.h>
#include<math.h>
main()
{
double x1,y1,x2,y2,d;
printf("输入两个坐标");
scanf("%lf%lf%lf%lf.&x1.&y1,&x2,&y2");
d=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
printf("两点间距离:d=%lf\n",d);
return 0;
}
求哪里错了，为什么运算结果是0

Answer 1

# define struct {
double x, y;
} point;
double distance(point a, b)
{
return (sqrt( (a.x - b.x) * (a.x - b.x) + (a.y - b.y) * (a.y - b.y) ));
}

追问

不懂啊，直接改正我的错误，谢谢了！