*分支-12. 计算火车运行时间

/*
 * Main.c
 * B12-分支-12. 计算火车运行时间
 *  Created on: 2014年6月4日
 *      Author: Boomkeeper
 *
 ********测试未通过*******
 */
#include <stdio.h>
#include <stdlib.h>

int startTime,arrTime;
int *p_startTime=&startTime;
int *p_arrTime=&arrTime;

/*将输入时间全部转化成分钟，再做时间差，算出运行的分钟数*/
int changeMinute(int *time)
{
    //printf("
now changMinute() starting...
");
    int hour,minute,newtime;

    hour=*time/100;
    minute=*time%100;
    newtime=hour*60+minute;
    //printf("now changeMinute() is closing...
");
    return newtime;
}

/*将运行时间（分钟数）再转成hh:mm形式*/
void changeHour(int *runTime)
{
    //printf("
now changeHour() is starting...
");
    int runTimeHour,runTimeMinute;

    runTimeHour=*runTime/60;
    //printf("runTimeHour = %i
",runTimeHour);
    runTimeMinute=*runTime-runTimeHour*60;
    //printf("runTimeMinute = %i
",runTimeMinute);

    printf("%02i:%02i
",runTimeHour,runTimeMinute);
    //printf("now changeHour() is closing...
");
}

/*如果没有跨过半夜12点*/
void inOneDay()
{
    //printf("
now inOneDay() is starting ...
");
    int startTimeMinute=changeMinute(p_startTime);
    //printf("startTimeMinute = %i
",startTimeMinute);
    int arrTimeMinute=changeMinute(p_arrTime);
    //printf("arrTimeMinute = %i
",arrTimeMinute);
    int runtime=arrTimeMinute-startTimeMinute;
    //printf("
runtime in minute = %i
",runtime);
    int *runTime=&runtime;

    changeHour(runTime);
    //printf("now inOneDay() is closing ...
");

}

/*如果跨过半夜12点*/
void inTwoDay()
{
    //printf("
now inTwoDay() is starting ...
");
    int startTimeMinute=changeMinute(p_startTime);
    //printf("startTimeMinute = %i
",startTimeMinute);
    int arrTimeMinute=changeMinute(p_arrTime);
    //printf("arrTimeMinute = %i
",arrTimeMinute);
    int runtime=24*60-(startTimeMinute-arrTimeMinute);
    //printf("
runtime in minute = %i
",runtime);
    int *runTime=&runtime;

    changeHour(runTime);
    //printf("now inTwoDay() is closing ...
");
}

/*判断输入数据的合法性*/
void judge(int *p_startTime,int *p_arrTime)
{
    //printf("now judge() is starting...
");
    if(*p_startTime<0 || *p_startTime>2359)
        exit(0);
    if(*p_arrTime<0 || *p_arrTime>2359)
        exit(0);
    if(*p_startTime == *p_arrTime)
    {
        printf("24:00
");//这里到底算不算在同一天内？不管怎么改，测试结果仍一样
        exit(0);
    }
    if(*p_startTime > *p_arrTime)
        inTwoDay();
    else
        inOneDay();
    //printf("now judge() is closing...
");
}

int main()
{
    scanf("%4i %4i",p_startTime,p_arrTime);
    //printf("get startTime=%i,arrTime=%i

",*p_startTime,*p_arrTime);

    judge(p_startTime,p_arrTime);

    return 0;
}