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// program to store data dynamically using malloc and extend the existing data using realloc and print it . #include<stdio.h> #include<stdlib.h> int main() { int *p, n, i, k; // Input the initial number of elements to be stored printf("Enter the number of elements to be stored: "); scanf("%d", &n); // Allocate memory dynamically using malloc p = (int*)malloc(n, sizeof(int)); // Check if memory allocation was successful if (p == NULL) { printf("Cannot allocate memory. Exiting...\n"); exit(1); } // Input initial elements from the user printf("Enter %d elements: ", n); for (i = 0; i < n; i++) { scanf("%d", p + i); } // Display the entered initial elements printf("The entered elements are: "); for (i = 0; i < n; i++) { printf("%4d", *(p + i)); } // Input the number of elements to extend printf("\nEnter the number of elements you want to extend: "); scanf("%d", &k); // Extend the allocated memory using realloc p = (int*)realloc(p, (n + k) * sizeof(int)); // Check if memory reallocation was successful if (p == NULL) { printf("Cannot allocate memory. Exiting...\n"); exit(1); } // Input the additional elements from the user printf("Enter the next %d elements: ", k); for (i = 0; i < k; i++) { scanf("%d", (p + n + i)); } // Display all entered elements after extending printf("The entered elements after extending are: "); for (i = 0; i < n + k; i++) { printf("%4d", *(p + i)); } // Free dynamically allocated memory free(p); return 0; }