//7-8-07
#include <stdio.h>
#include <stdlib.h>

int main( void )
main()
{
//Define Variables
int seed;
cin.get();
double r;
long int M;
double x;
int y;
int z;
int count;
//Code
seed = 10000;
srand(seed);
M = 1000;
for(count=1; count<=20; ++count)
{
r = (   (double)rand() / ((double)(RAND_MAX)+(double)(1)) );
x = (r * M);
y = (int) x;
z = y + 1;
printf("random number %3d %5f %5f %5d %5d\n",count,r,x,y,z);
}
}

srand( static_cast<int>( time(0) )

#include <iostream>
#include <vector>
#include <string>
#include <time.h>
 
// Gets input from the user's keyboard, returns the input in the form of a double.
double GetNumber( void ) 
{
	std::cout << "Enter Number or 0 to exit: ";
	double ret;
 
	std::cin >> ret;
	return ret;	
}
 
// Retrieves the numbers from the user and stores/returns a vector of doubles.
std::vector<double> GetNumbers( void )
{
	std::vector<double> nums;
	for (;;)
	{
		double num = GetNumber();
		if ( num = 0 )
			break;
		else
			nums.push_back( num );
	}
	return nums;	
}
 
int main( void )
{
	std::vector<double> numbers = GetNumbers();
 
	std::cout << "What number from the list do you want to see? ( 1 - " << numbers.size() << ")";
	int choice;
 
	std::cin >> choice;
 
	std::cout << numbers[choice - 1] << std::endl;
 
	return 0;
}