• 【HDU 5387】Clock


    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$$(1leq T leq 10^4)$ test cases 
    for each case,one line include the time 

    $0leq hh<24$,$0leq mm<60$,$0leq ss<60$
     

    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

    4
    00:00:00
    06:00:00
    12:54:55
    04:40:00
     

    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:

    求给定时间点的时针、分针、秒针的夹角(分数、角度制)

    分析:

    tol=总秒数,时针1/120 °/s,分针1/10 °/s,秒针 6 °/s,

    针和针转过的角度差(tol/10-tol/120)=11*tol/120;

    秒针和时针转过的角度差(6*tol-tol/120)=719*tol/120;

    秒针和分针转过的角度差(6*tol-tol/10)=59*tol/10;

    然后前两个角度差的分子%(120*360)即%43200,后面一个%3600,这样就<360了,就是我们要求的夹角或其补角了。

    然后判断夹角up/down 是否大于180度,刚开始我让它>180就360减去它,但是 这里是整除,也就是180多一点点的整除了变成180,所以要写成>=180或>179时就让360减去它。

    接下来约分输出。

    代码:

     1 #include<stdio.h>
     2 int t,h,m,s,tol,up[4],down[4],g;
     3 int gcd(int a,int b)
     4 {return b?gcd(b,a%b):a;}
     5 int main()
     6 {
     7     scanf("%d",&t);
     8     while(t--)
     9     {
    10         scanf("%d:%d:%d",&h,&m,&s);
    11         tol=h*3600+m*60+s;
    12         up[0]=(11*tol)%(43200);
    13         up[1]=(719*tol)%(43200);
    14         up[2]=(59*tol)%(3600);
    15         down[0]=down[1]=120;down[2]=10;
    16         for(int i=0; i<3; i++)
    17         {
    18             g=gcd(up[i],down[i]);
    19             up[i]/=g;down[i]/=g;
    20             if(up[i]/down[i]>179)up[i]=down[i]*360-up[i];
    21             if(down[i]==1)printf("%d ",up[i]);
    22             else printf("%d/%d ",up[i],down[i]);
    23         }
    24         printf("
    ");
    25     }
    26     return 0;
    27 }
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  • 原文地址:https://www.cnblogs.com/flipped/p/5183793.html
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