POJ 2966 时区转换 解题报告

POJ 2966 时区转换 解题报告

编号：2966

 

考查点：日期和时间处理

 

思路：还是找到公共点，都把时间转换为分钟，最后通过分钟来计算目标时区的时间表示

 

提交情况:这道题是我用时间最多的，历经三天，代码重写了无数遍，不容易..

 

Source Code：

 

//POJ Grids 2966
#include <string>
#include<iostream>
using namespace std;

float Time(const char* time)
{
    if (strcmp(time,"UTC")==0||strcmp(time,"GMT")==0||strcmp(time,"WET")==0)
    {
        return 0;
    }
    if (strcmp(time,"BST")==0||strcmp(time,"IST")==0||strcmp(time,"WEST")==0||strcmp(time,"CET")==0)
    {
        return 1;
    }
    if (strcmp(time,"CEST")==0||strcmp(time,"EET")==0)
    {
        return 2;
    }
    if (strcmp(time,"EEST")==0||strcmp(time,"MSK")==0)
    {
        return 3;
    }
    if (strcmp(time,"MSD")==0)
    {
        return 4;
    }
    if (strcmp(time,"AST")==0||strcmp(time,"EDT")==0)
    {
        return -4;
    }
    if (strcmp(time,"ADT")==0)
    {
        return -3;
    }
    if (strcmp(time,"NST")==0)
    {
        return -3.5;
    }
    if (strcmp(time,"NDT")==0)
    {
        return -2.5;
    }
    if (strcmp(time,"EST")==0||strcmp(time,"CDT")==0)
    {
        return -5;
    }
    if (strcmp(time,"CST")==0||strcmp(time,"MDT")==0)
    {
        return -6;
    }
    if (strcmp(time,"MST")==0||strcmp(time,"PDT")==0)
    {
        return -7;
    }
    if (strcmp(time,"PST")==0||strcmp(time,"AKDT")==0)
    {
        return -8;
    }
    if (strcmp(time,"AKST")==0)
    {
        return -9;
    }
    if (strcmp(time,"HST")==0)
    {
        return -10;
    }
    if (strcmp(time,"AWST")==0)
    {
        return 8;
    }
    if (strcmp(time,"AEST")==0)
    {
        return 10;
    }
    if (strcmp(time,"AEDT")==0)
    {
        return 11;
    }
    if (strcmp(time,"ACDT")==0)
    {
        return 10.5;
    }
    if (strcmp(time,"ACST")==0)
    {
        return 9.5;
    }
    cout<<"Error"<<endl;
    return -1;


}

int main()
{
    int n;
    cin>>n;
    while (n--)
    {
        string first;
        string second;
        cin>>first;
        int ho,mi;
        ho = mi = 0;
        if (first=="noon"||first=="midnight")
        {
            if (first=="noon")
            {
                ho = 12;
            }
        }
        else
        {
            sscanf(first.c_str(),"%d:%d",&ho,&mi);

            cin>>second;
            if (second=="p.m.")
            {
                ho %= 12;
                ho += 12;
            }
            if (second=="a.m.")
            {
                if (ho==12)
                {
                    ho = 0;
                }
            }
        }
        string zone,ztwo;
        cin>>zone>>ztwo;
        int minutes = ho*60+mi-Time(zone.c_str())*60+Time(ztwo.c_str())*60;

        minutes = (minutes+1440)%1440;

        string time = "a.m.";
        if (minutes==0||minutes==720)
        {
            if (minutes)
            {
                cout<<"noon"<<endl;
            }
            else
                cout<<"midnight"<<endl;
        }
        else
        {
            ho = minutes/60;
            mi = minutes%60;
            if (ho==0)
            {
                ho = 12;
            }
            else if (ho>=12)
            {
                time = "p.m.";
                if(ho!=12)
                    ho -= 12;
            }

            printf("%d:%02d %s\n",ho,mi,time.c_str());
        }
    }

    return 0;
}

总结：这次浪费时间多重要是POJ显示Wrong Answer（The test data is not available），其实还是WA的意思，我还以为是POJ的问题呢，就一直把这道题半死不活的放那，今天在别人的帮助下，学会了用string代替char*,用sscanf函数得到小时和分钟，努力了很长时间，终于AC。

 

 

 

                                                       By   Ns517

                                                      Time 09.01.26