c语言代码解决问题

解题思路:

注意事项:

参考代码:

#include<stdio.h>

#include<math.h>

int main()

{

    double xa, xb, ya, yb,distance,length;

    scanf("%lf %lf", &xa, &ya);

    scanf("%lf %lf", &xb, &yb);

    length = (xb - xa) * (xb - xa) + (ya - yb) * (ya - yb);

    distance = sqrt(length);

    printf("%.3lf", distance);

    return 0;

}