Broken timer

[freeman1223]

Hello, I'm working on a game for a schoolproject and have encountered an error.
this is my code:

#include "outpu.h"
#include <time.h>
#include <string>
#include <iostream>
#include <conio.h>
using namespace std;

void textout(string text)
{
	srand(time(NULL));
	long lengte = text.size();
	float cntr;
	int randomget;
	clock_t btime;
	clock_t t;
	bool br=false;
	for (int b=0; b < lengte; b++)
	{
		randomget = 100 - (rand() % 50);
		cout << text.substr(b, 1);
		cntr = randomget / 10000.0;
		btime = clock();
		t = clock()-btime;
		while ((t) / CLOCKS_PER_SEC < cntr)
		{
			if (_kbhit())
				br = true;
			t = clock() - btime;
			if (br)
				break;
		}
		if (br)
		{
			cout << text.substr(b + 1, (lengte - (b + 1)));
			break;
		}
	}
}

and I think it should work, but it takes way too long in between letters...
any help?
also I wonder if it's possible to get the program to notice the key hit, but not save that data to cin