Stuart is working on a program to manage arrays. Given an initial array size and elements, the program resizes the array to twice its original size and fills the additional places with the same original elements. Write a program to help Stuart dynamically allocate the memory for the array using malloc(), and then resize using realloc(), and then print the elements of the resized array.Input format :The first line of input consists of an integer N, representing the initial size of the array.The second line consists of N space-separated integers, representing the initial elements of the sequence.
Question
Stuart is working on a program to manage arrays. Given an initial array size and elements, the program resizes the array to twice its original size and fills the additional places with the same original elements. Write a program to help Stuart dynamically allocate the memory for the array using malloc(), and then resize using realloc(), and then print the elements of the resized array.Input format :The first line of input consists of an integer N, representing the initial size of the array.The second line consists of N space-separated integers, representing the initial elements of the sequence.
Solution
Here is a simple C program that accomplishes the task:
#include <stdio.h>
#include <stdlib.h>
int main() {
int N, i;
int *arr;
// Read the initial size of the array
scanf("%d", &N);
// Dynamically allocate memory using malloc()
arr = (int*) malloc(N * sizeof(int));
// Check if the memory has been successfully allocated
if(arr == NULL) {
printf("Memory not allocated.\n");
exit(0);
}
// Read the initial elements of the array
for(i = 0; i < N; i++) {
scanf("%d", &arr[i]);
}
// Resize the array using realloc()
arr = (int*) realloc(arr, 2 * N * sizeof(int));
// Check if the memory has been successfully reallocated
if(arr == NULL) {
printf("Memory not reallocated.\n");
exit(0);
}
// Fill the new elements with the same original elements
for(i = N; i < 2*N; i++) {
arr[i] = arr[i-N];
}
// Print the elements of the resized array
for(i = 0; i < 2*N; i++) {
printf("%d ", arr[i]);
}
// Free the memory
free(arr);
return 0;
}
This program first reads the initial size of the array and the initial elements. It then resizes the array to twice its original size using realloc(), fills the additional places with the same original elements, and prints the elements of the resized array.
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