Generating Random Numbers in C++

• Computers can't generate truly random numbers; they generate pseudo-random numbers
  
• Random numbers are used extensively to test programs; easier than typing input from the keyboard all day
  
• Used in many simulations (games) to add a sense of "chance" to the program
  
• Computers have built-in algorithms that produce pseudo-random numbers for programs to use
  
• One method of accessing these numbers is to call the C++ library function rand() which will return a random integer between 0 and 32767
  

#include <iostream.h> // for cout
#include <stdlib.h>   // for rand()

void main(void)
{
  for (int x = 0; x < 5; x++)
    cout << rand() << endl;
}

Output:
346
130
10982
1090
17595