标准IO把时间写入文件

在已写时间的文件中继续追加时间记录

 

#include
#include
#include
#include

#define BUFF 50

int main()
{
 FILE *fp;
 int count = 0;
 char buf[BUFF];
 time_t t;
 struct tm *ts;

 if ((fp = fopen("time.txt", "r+")) == NULL)
 {
  perror("open error");

  return -1;
 }

 while (fgets(buf, BUFF, fp) != NULL)
 {
  count++;
 }

 while(1)
 {
  time(&t);
  ts = localtime(&t);

  fprintf(fp, "%d,%d-%d-%d %d:%d:%d\n", ++count, ts->tm_year+1900, ts->tm_mon+1, ts->tm_mday, ts->tm_hour, ts->tm_min, ts->tm_sec);
  fflush(fp);

  sleep(1);
 }

 return 0;
}