标签：second code col class font sign plain span std
void usleep(int micro_seconds); #include <unistd.h>
void
usleep(
int
micro_seconds); #include <unistd.h>
unsigned int sleep (unsigned int seconds);//n秒
延时函数
原文地址：https://www.cnblogs.com/yangxingsha/p/11512323.html
