用clock实现延时

#include <iostream>

#include <ctime>

using namespace std;

int main(){

    cout<<"Enter delay time in seconds\n";

    float secs;

    cin>>secs;

    clock_t delay=secs*CLOCKS_PER_SEC;

    cout<<"starting\a\n";

    clock_t start=clock();

    while(clock()-start<delay);

    cout<<"done\a\n";

    return 0;

}