Random
Pseduo Random Number
#include <iostream>
#include <cstdlib>

int main(int argc, char *argv[])
{
	int seed = 10;
	srand(seed);

	std::cout<<"Rand() return an integer between 0 and "<<RAND_MAX<<std::endl;

	//generate random integer number
	for(int i = 0; i < 5; i++)
		std::cout<<rand()%100<<std::endl;

	//generate random float number [0, 1]
	for(int i = 0; i < 5; i++)
		std::cout<<rand()/float(RAND_MAX)<<std::endl;

	return 0;
}
			
Random Number
#include <iostream>
#include <cstdlib>
#include <ctime>

int main(int argc, char *argv[])
{
	int seed = 10;
	srand(time(NULL));

	std::cout<<"Rand() return an integer between 0 and "<<RAND_MAX<<std::endl;

	//generate random integer number
	for(int i = 0; i < 5; i++)
		std::cout<<rand()%100<<std::endl;

	//generate random float number [0, 1]
	for(int i = 0; i < 5; i++)
		std::cout<<rand()/float(RAND_MAX)<<std::endl;

	return 0;
}