请问一下，c＋＋中有没有类似matlab中一样可以给程序的运行时间计时的功能？

如果有的话麻烦给个例子在此先行谢过了！

这个当然有了

给你例子
// crt_clock.c
// This example prompts for how long
// the program is to run and then continuously
// displays the elapsed time for that period.
//

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

void sleep( clock_t wait );

int main( void )
{
long i = 6000000L;
clock_t start, finish;
double duration;

// Delay for a specified time.
printf( "Delay for three seconds\n" );
sleep( (clock_t)3 * CLOCKS_PER_SEC );
printf( "Done!\n" );

// Measure the duration of an event.
printf( "Time to do %ld empty loops is ", i );
start = clock();
while( i-- )
;
finish = clock();
duration = (double)(finish - start) / CLOCKS_PER_SEC;
printf( "%2.1f seconds\n", duration );
return 0;
}

// Pauses for a specified number of milliseconds.
void sleep( clock_t wait )
{
clock_t goal;
goal = wait + clock();
while( goal > clock() )
;
}