Check out example codes for "c++ random numbers". It will help you in understanding the concepts better.

Code Example 1

v1 = rand() % 100;         // v1 in the range 0 to 99
v2 = rand() % 100 + 1;     // v2 in the range 1 to 100
v3 = rand() % 30 + 1985;   // v3 in the range 1985-2014

Code Example 2

#include <stdio.h>      /* NULL */
#include <stdlib.h>     /* srand, rand */
#include <time.h>       /* time */

  int randomNumber;

  /* initialize random seed: */
  srand (time(NULL));

  /* generate random number between 1 and 10: */
  randomNumber = rand() % 10 + 1;

Code Example 3

Guess the number (1 to 10): 5
The secret number is higher
Guess the number (1 to 10): 8
The secret number is lower
Guess the number (1 to 10): 7
Congratulations!

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