[恢]hdu 2001

2011-12-12 03:30:57

地址：http://acm.hdu.edu.cn/showproblem.php?pid=2001

题意：中文题。

代码：

# include <stdio.h>
# include <math.h>


int main ()
{
    double x1, y1, x2, y2 ;
    while (~scanf ("%lf%lf%lf%lf", &x1, &y1, &x2, &y2))
        printf ("%.2lf\n", sqrt    ((x1-x2)*(x1-x2) + (y1-y2)*(y1-y2))) ;
    return 0 ;
}