Ŀ

գҪıйص䡣
һrepeat (0<repeat<10)repeat㣺
ƽ (x1, y1)  (x2, y2)֮ľ(2λС)
Ҫ͵ú dist(x1, y1, x2, y2)ľ룬βx1y1x2y2Ͷdoubledouble
ʾ˵

1               (repeat=1)
10 10           (x1=10, y1=10)
200 100         (x2=200, y2=100)

Distance = 210.24



#include <stdio.h>
#include <math.h>
double dist(double x1, double y1, double x2, double y2);
int main(void)
{
    int repeat, ri;
    double distance, x1, y1, x2, y2;

    scanf("%d", &repeat);
    for(ri = 1; ri <= repeat; ri++){
        scanf("%lf%lf%lf%lf", &x1, &y1, &x2, &y2);
 /*---------*/
        printf("Distance = %.2f\n", distance);
    }
}

/*---------*/

