函数名: setftime 
 功  能: 设置文件日期和时间 
 用  法: #include <stdio.h> 
         int setftime(int handle, struct ftime *ftimep); 
 程序例: 
#include <stdio.h> 
 #include <process.h> 
 #include <fcntl.h> 
 #include <io.h> 
int main(void) 
 { 
    struct ftime filet; 
    FILE *fp; 
   if ((fp = fopen("TEST.$$$", "w")) == NULL) 
    { 
       perror("Error:"); 
       exit(1); 
    } 
fprintf(fp, "testing...\n");
   /* load ftime structure with new time and date */ 
    filet.ft_tsec = 1; 
    filet.ft_min = 1; 
    filet.ft_hour = 1; 
    filet.ft_day = 1; 
    filet.ft_month = 1; 
    filet.ft_year = 21; 
   /* show current directory for time and date */ 
    system("dir TEST.$$$"); 
   /* change the time and date stamp*/ 
    setftime(fileno(fp), &filet); 
   /* close and remove the temporary file */ 
    fclose(fp); 
system("dir TEST.$$$");
   unlink("TEST.$$$"); 
    return 0; 
 }