HDU 5387 Clock(模拟)——(多校练习8)

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Clock

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)


Problem Description
Give a time.(hh:mm:ss),you should answer the angle between any two of the minute.hour.second hand
Notice that the answer must be not more 180 and not less than 0
 

Input
There are T(1T104) test cases
for each case,one line include the time

0hh<24,0mm<60,0ss<60
 

Output
for each case,output there real number like A/B.(A and B are coprime).if it's an integer then just print it.describe the angle between hour and minute,hour and second hand,minute and second hand.
 

Sample Input
400:00:0006:00:0012:54:5504:40:00
 

Sample Output
0 0 0 180 180 0 1391/24 1379/24 1/2 100 140 120
Hint
每行输出数据末尾均应带有空格
 
/*********************************************************************/

题意:给你一个格式为hh:mm:ss的时间,问改时间时针与分针、时针与秒针、分针与秒针之间夹角的度数是多少,若夹角度数不是整数,则输出最简分数形式A/B,即A与B互质。

解题思路:该题的思路很简单,只需先将时针、分针、秒针代表的时间转换成距离0刻度的角度,然后再求两者之间夹角的度数就会方便许多,需要注意,每秒钟,秒针对分针的贡献是0.1°,秒针对时针的贡献是(1/120)°;每分钟,分针对时针的贡献是0.5°。为了使得计算角度时均为整数,本人特地将角度放大了120倍,最后反正是要化成最简分数形式的,故再除以120即可。

其他细节之处会在代码中作出解释。

#pragma comment(linker, "/STACK:1024000000,1024000000")#include<stdio.h>#include<string.h>#include<stdlib.h>#include<queue>#include<math.h>#include<vector>#include<map>#include<set>#include<stdlib.h>#include<cmath>#include<string>#include<algorithm>#include<iostream>#define exp 1e-10using namespace std;const int N = 1005;const int inf = 1000000000;const int mod = 1000000007;void gcd(int a,int b)//利用辗转相除法求最大公约数,使得分数最简{    int m=a,n=b;    while(a!=b)        if(a>b)            a=a-b;        else            b=b-a;    printf("%d/%d ",m/a,n/a);}int main(){    int t,h,m,s,a,b,c;    scanf("%d",&t);    while(t--)    {        scanf("%d:%d:%d",&h,&m,&s);        h%=12;//时钟一圈12小时,故24小时制的时间要转换成12小时制        h=h*3600+m*60+s;//时针、分针、秒针的角度均放大120倍,使计算过程中不会出现小数        m=m*720+s*12;        s*=720;        //printf("%d %d %d*\n",h,m,s);        a=abs(h-m);//计算时针与分针之间的夹角        b=abs(h-s);//计算时针与秒针之间的夹角        c=abs(m-s);//计算分针与秒针之间的夹角        if(a>21600)//当夹角超过180°时,通过360°减去当前夹角使夹角小于180°            a=43200-a;        if(b>21600)            b=43200-b;        if(c>21600)            c=43200-c;        //printf("%d %d %d#\n",a,b,c);        if(a%120)            gcd(a,120);        else            printf("%d ",a/120);        if(b%120)            gcd(b,120);        else            printf("%d ",b/120);        if(c%120)            gcd(c,120);        else            printf("%d ",c/120);        printf("\n");    }    return 0;}

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