uva579 計算幾何入門

題目連結：http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&category=101&problem=520&mosmsg=Submission+received+with+ID+11532034

題意：給出時針和分針，輸出夾角。。。

#include <cstdio>#include <cmath>#include <iostream>using namespace std;#define min(a,b)((a)<(b)?(a):(b))int main(){int a, b;while (scanf("%d:%d", &a, &b), a || b){if (a == 12) a-= 12;double x, y;y = b;x = a * 5.0 + y / 60.0 * 5.0;double cha = fabs(x - y);if (cha > 30.0) cha = 60 - cha;printf("%.3lf\n", cha * 6.0);}return 0;}