for 与while 的比较

#include <iostream>
#include "Sort_algorithm.h"
#include <stdlib.h>
#include <ctime>
#include <iostream>

using namespace std;
int main()
{
int L = 1000000000;
clock_t start,end;
double spent_for,spent_while;
start = clock();
for(int i = 0; i < L; i++)
{}
end = clock();
spent_for = (double) (end - start) / CLOCKS_PER_SEC;

start = clock();
while(L--)
{}
end = clock();
spent_while = (double) (end - start) / CLOCKS_PER_SEC;

cout<<"for spent seconds = "<<spent_for<<endl;
cout<<"while spent seconds = "<<spent_while<<endl;

return 0;
}