﻿ Random Numbers
```//---------------------------------------------------------
// Demonstrate rand() and srand().
//---------------------------------------------------------
#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
char ch;

cout << "RAND_MAX = " << RAND_MAX << endl << endl;

// Display a sequence of 13 random values

for(int i = 0; i < 13; i++)
{
cout << setw(6) << rand();
}
cout << endl << endl;

// Using the same seed value, display 3 sequences
// of 13 random values.

for(int i = 0; i < 3; i++)
{
srand(0);
for(int j = 0; j < 13; j++)
{
cout << setw(6) << rand();
}
cout << endl;
}
cout << endl;

// Using the different seed values, display 3 sequences
// of 13 random values.

for(int i = 0; i < 3; i++)
{
srand(i);
for(int j = 0; j < 13; j++)
{
cout << setw(6) << rand();
}
cout << endl;
}
cout << endl;

// "Randomize" the number generator

for(int i = 0; i < 3; i++)
{
srand(time(NULL));
for(int j = 0; j < 13; j++)
{
cout << setw(6) << rand();
}
cout << endl;

cout << "Tap 'Enter' to continue...";
cin.get(ch);
cout << endl;
}
cout << endl;

// Display values between 0.0 and 1.0 (not including 1.0).

cout << fixed << setprecision(3);
for(int i = 0; i < 13; i++)
{
cout << setw(6) << double(rand())/double(RAND_MAX + 1);
}
cout << endl << endl;

return 0;
}```