zoj3015.cpp

最近在acm.zju.edu.cn上通过的题目的代码

#include <stdio.h>
#include <math.h>
#define pi acos(-1.0) 

int main(){
    double k, h, a, b, x, y, d, f;
    while(scanf("%lf%lf%lf%lf", &k, &h, &a, &b) != EOF){
        f = tan(k*pi/180);
        x = (-f*f*b+2*h*f+b)/(1+f*f);
        y = (x-b)/f;
        d = sqrt(x*x+(y-a)*(y-a));
        printf("%.2lf\n", d);
    }
    return 0;
}