c语言日志打印

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

#define LOG_SWITCH 1
/* 在想要打印的.c文件中定义并调用即可，注意设置好文件路径 */
void DEV_LOG(const char* ptrFormatInput, ...)
{
    time_t systemTime;
    struct tm* formatSystemTime = NULL;
    char buffer[];
    FILE* ptrFile = NULL;

    if (LOG_SWITCH)
    {
        ptrFile = fopen("./DEV_LOG.log", "a");
        if (ptrFile == NULL) {
            return;
        }
        /* 获取系统时间 */
        time(&systemTime);
        formatSystemTime = localtime(&systemTime);
        (void)sprintf(buffer,
                      "\r\n[ %u-%u-%u %u:%u:%u ]  ",
                      formatSystemTime->tm_year + ,
                      formatSystemTime->tm_mon + ,
                      formatSystemTime->tm_mday,
                      formatSystemTime->tm_hour,
                      formatSystemTime->tm_min,
                      formatSystemTime->tm_sec);
        (void)fprintf(ptrFile, "%s", buffer);

        va_list ptrArgs;
        va_start(ptrArgs, ptrFormatInput);
        vsnprintf(buffer, sizeof(buffer), ptrFormatInput, ptrArgs);
        va_end(ptrArgs);

        buffer[ - ] = '\0';

        (void)fprintf(ptrFile, "%s", buffer);
        (void)fclose(ptrFile);
    }
}

int main() {
    char name[] = "tongysihu";
    int age = ;
    DEV_LOG("SelfInfo -- name : %s, age : %d",name, age);
    return ;
}