Question

Create C program that takes 1 parameter: a number.

Using that number, dynamically allocate a memory so you store that number of integers.

Write integers in order starting from 1 until you fill all that memory.

Print the addresses and values of the first and the last integer stored in the memory.

Help ASAP!!!

Answer 1

Hi,

Hope you are doing fine. I have coded the above question in C keeping all the conditions in mind. Since a sample output of the code is not provided, I have taken the liberty to write it as per my convenience. You may modify it as per your requirement. The code has been clearly explained using comments that have been highlighted in bold.

Program:

#include<stdio.h>
#include<stdlib.h>

int main()
{
   //declaring variables
   //num is the input parameter, i is used for indexing
   int num,i=0;
   //promptiong user for input
   printf("Enter a number:\n");
   scanf("%d",&num);
   //declaring pointer that will hold the base address of the dynamic memory block
   int *arr;
   //dynamically allocating memory of size num to hold a list of integers. arr points to the base address of the memory
   arr=(int*)malloc(num * sizeof(int));
   //filling the dynamically allocated memory
   for(i=0;i<num;i++)
   {
       arr[i]=i+1;
   }
   //printing the value of first integer
   printf("Value of first integer: %d\t",arr[0]);
   //printing the address of first integer
   printf("Address: %d\n",&arr[0]);
   //printing the value of last integer
   printf("Value of last integer: %d\t",arr[num-1]);
   //printing the address of last integer
   printf("Address: %d\n",&arr[num-1]);
  
}

Executable code snippet:

Output: