C——生成log文件

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

void writelog(const char *log)
{
time_t tDate;
struct tm *eventTime;
time(&tDate);
eventTime = localtime(&tDate);
int iYear = eventTime->tm_year + 1900;
int iMon = eventTime->tm_mon + 1;
int iDay = eventTime->tm_mday;
int iHour = eventTime->tm_hour;
int iMin = eventTime->tm_min;
int iSec = eventTime->tm_sec;
char sDate[16];
sprintf(sDate, "%04d-%02d-%02d", iYear, iMon, iDay);
char sTime[16];
sprintf(sTime, "%02d:%02d:%02d", iHour, iMin, iSec);
char s[1024];
sprintf(s, "%s %s %s\n", sDate, sTime, log);
FILE *fd = fopen("my.log", "a+");
fputs(s, fd);
fclose(fd);
}

void main()
{

writelog("begin ");
printf("hello ,michael!");
writelog("end");
return;

}