C语言转换时间戳为任意格式的字符串

#include <time.h>

//例如：1589541757 "%Y/%#m/%#d %#H:%#M:%#S" 对应的是 "2020/5/15 19:22:37"
void timeformat(char* buf, int len,char* format, time_t timestamp)
{
	strftime(buf, len, format, localtime(&timestamp));
}