Question

There is a pair of functions in stdlib.h (make sure to include it) that are used for generating pseudo-random numbers. These are "srand" and "rand". Examples are on pages 686 and 687. E.g., function "srand(3)" provides the seed value of 3 to the srand function. (3 is just a number, and probably isn't even a good number for this purpose, but that's a discussion for another time). The reason that we use a seed value is so that we can reproduce the series of random numbers. Thus, we call them pseudo-random numbers. Being able to reproduce them is important to verify and debug code.

Write a C program to generate a set of random numbers for a given seed value (call it lab8_part1.c). Prompt the user for the seed value, or 0 to quit. Then print 5 random values. When you run your program, try a few different seed values, then try one that you've already tried. Verify that you get the same sequence.

Answer 1

CODE -

#include<stdio.h>

#include<stdlib.h>

int main()

{

    int seed;

    // Taking seed value as input from the user

    printf("\nEnter a seed value (0 to quit): ");

    scanf("%d", &seed);

    // Running the loop until user enters 0 to quit

    while(seed != 0)

    {

        // Passing seed value to the function srand()

        srand(seed);

        // Printing 5 random values

        for(int i=0; i<5; i++)

            printf("%d ", rand());

        // Taking next seed value as input from the user

        printf("\nEnter a seed value (0 to quit): ");

        scanf("%d", &seed);

    }

    return 0;

}

SCREENSHOTS -

CODE -

OUTPUT -

If you have any doubt regarding the solution, then do comment.
Do upvote.