实现一个函数，对给定平面任意两点坐标(x 1 ,y 1 )和(x 2 ,y 2 )，求这两点之间的距离

#include 
#include 

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

int main()
{
         
    double x1, y1, x2, y2;

    scanf("%lf %lf %lf %lf", &x1, &y1, &x2, &y2);
    printf("dist = %.2f\n", dist(x1, y1, x2, y2));

    return 0;
}
double dist( double x1, double y1, double x2, double y2 )
{
     
    double d = pow( (x1-x2), 2) + pow( (y1-y2), 2);
    double f = sqrt( d );
    return f;
}