run.c

C语言表达式语法分析器

#include <time.h>
#include <stdio.h>
int main()
{
	clock_t i,j,k;
	time_t now;
	i=clock();
	for(k=0;k<1000;k++)j=k^100;
	j=clock();
	printf("CLOCKS_PER_SEC=%f\n",CLOCKS_PER_SEC);
	printf("take time:%f second\n",(double)(j-i)/CLOCKS_PER_SEC);
	printf("clock():%ld\n",clock());
	now=time(NULL);
	printf("The current date and time is: %s", ctime(&now));
	system("pause");
}