题解 2773: 计算线段长度--C

解题思路:double

注意事项:

参考代码:

#include<stdio.h>
#include <math.h>
int main()

{
    double x1, y1, x2, y2;
    double a, b, c;
    int ret;
    do{
        ret = scanf("%lf %lf", &x1, &y1);
    }while (ret!=2||fabs(x1)-0>10000||fabs(y1)-0>10000);
    do{
        ret = scanf("%lf %lf", &x2, &y2);
    }while (ret!=2||fabs(x2)-0>10000||fabs(y1)-0>10000);
    a = (x2 - x1);
    b = (y2 - y1);
    c = sqrt(b*b+a*a);
    printf("%.3lf\n", c);
    return 0;
}