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

Code Example 1

``````// C program to generate random numbers
#include <stdio.h>
#include <stdlib.h>
#include<time.h>

// Driver program
int main(void)
{
// This program will create different sequence of
// random numbers on every program run

// Use current time as seed for random generator
srand(time(0));

for(int i = 0; i<5; i++)
printf(" %d ", rand());

return 0;
}``````

Code Example 2

``````/* rand example: guess the number */
#include <stdio.h>      /* printf, scanf, puts, NULL */
#include <stdlib.h>     /* srand, rand */
#include <time.h>       /* time */

int main ()
{
int iSecret, iGuess;

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

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

do {
printf ("Guess the number (1 to 10): ");
scanf ("%d",&iGuess);
if (iSecret<iGuess) puts ("The secret number is lower");
else if (iSecret>iGuess) puts ("The secret number is higher");
} while (iSecret!=iGuess);

puts ("Congratulations!");
return 0;
}``````

Code Example 3

``rand() % (max_number + 1 - minimum_number) + minimum_number``

Code Example 4

``````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 5

``````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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