自己编写的C语言实时时钟代码

#include <time.h>

void shijian()
{
struct tm *t;
char week[3]="/0";
time_t timer;
time(&timer);
t=localtime(&timer);

/**********************************/
/*   本身localtime输出的周为数字 */
/*   是0~6分别表示周日到周六，   */
/*   阅读不便，在此做个小优化    */
/*********************************/

switch(t->tm_wday)
{
case 1:
strcpy(week,"Mon");
break;
case 2:
strcpy(week,"Tue");
break;
case 3:
strcpy(week,"Wed");
break;
case 4:
strcpy(week,"Thu");
break;
case 5:
strcpy(week,"Fri");
break;
case 6:
strcpy(week,"Sat");
break;
default:
strcpy(week,"Sun");

}

printf("YEAR \t MONTH \t DAY \t    TIME \t WEEK\n");
printf("%d \t   %02d    %02d  \t  %02d:%02d:%02d \t  %s\n",1900+t->tm_year,1+t->tm_mon,t->tm_mday,t->tm_hour,t->tm_min,t->tm_sec,week);

}

#include <windows.h>

/************************/
/*   Sleep单位是毫秒    */
/************************/

void sleep(unsigned long sec)
{
Sleep(sec);
}

#ifdef  _SHIJIAN_H
#define _SHIJIAN_H
void shijian()

#endif

#ifdef  _SLEEP_H
#define _SLEEP_H
extern void sleep(unsigned long sec)
#endif

#include <stdio.h>
#include <conio.h>
#include "sleep.h"

int main()
{
while(!kbhit())
{
shijian();
sleep(1000);
system("cls");
}
return 0;
}