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c语言时间函数秒 c语言输入秒数输出时间( 九 )

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Ordinary characters (including the terminating '\0') are copied into s. Each %c is replaced as described below,
using values appropriate for the local environment.
No more than smax characters are placed into s. strftime returns the number of characters, excluding the '\0',
or zero if more than smax characters were produced.
%a abbreviated weekday name.
%A full weekday name.
%b abbreviated month name.
%B full month name.
%c local date and time representation.
%d day of the month (01-31).
%H hour (24-hour clock) (00-23).
%I hour (12-hour clock) (01-12).
%j day of the year (001-366).
%m month (01-12).
%M minute (00-59).
%p local equivalent of AM or PM.
%S second (00-61).
%U week number of the year (Sunday as 1st day of week) (00-53).
%w weekday (0-6, Sunday is 0).
%W week number of the year (Monday as 1st day of week) (00-53).
%x local date representation.
%X local time representation.
%y year without century (00-99).
%Y year with century.
%Z time zone name, if any.
%%%
如何用C语言编写一个显示时间的函数，要求时间显示精度到毫秒级别 。#include cstdio
#include ctime
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
void printTime() {
struct tm t;//tm结构指针
time_t now;//声明time_t类型变量
time(now);//获取系统日期和时间
localtime_s(t, now);//获取当地日期和时间
//格式化输出本地时间
printf("年-月-日-时-分-秒c语言时间函数秒：%d-%d-%d %d:%d:%d\n", t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, t.tm_hour, t.tm_min, t.tm_sec);
}
int main(int argc, char** argv) {
printTime();
}
c语言计时函数在开始时用time()函数取一次时间，在结束时（输入与生成相同时）再用time()取一次时间，之后求出再次时间之差即可 。
*************************************************
#include
//for
printf()
#include
//for
system()
#include
//for
time()
time_t
void
main()
{
time_t
ts,te;
system("pause");
ts=time(null);
system("pause");
te=time(null);
printf("%ld\n",te-ts);
system("pause");
}
/////////////////////////////////////////////
输出两次按键之间的时间（秒）
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