How to implement solution with dynamic array resizing in c - memory corruption when using `realloc`
I've been banging my head against this for hours. I'm working with a memory corruption scenario when trying to resize a dynamically allocated array using `realloc`. My code is supposed to create an initial array of integers, populate it, and then resize it to accommodate more elements. However, after calling `realloc`, I'm experiencing unpredictable behavior, including crashes and incorrect values in the array. Here's the relevant code snippet: ```c #include <stdio.h> #include <stdlib.h> int main() { int *arr = malloc(5 * sizeof(int)); if (arr == NULL) { perror("Failed to allocate memory"); return EXIT_FAILURE; } for (int i = 0; i < 5; i++) { arr[i] = i + 1; } // Attempting to resize the array int new_size = 10; int *temp = realloc(arr, new_size * sizeof(int)); if (temp == NULL) { free(arr); perror("Failed to reallocate memory"); return EXIT_FAILURE; } arr = temp; // Accessing elements beyond the original size for (int i = 0; i < new_size; i++) { if (i >= 5) arr[i] = i + 1; // Initialize new elements printf("%d ", arr[i]); } printf("\n"); free(arr); return 0; } ``` In this code, I allocate an initial array of 5 integers, populate them, and then try to resize the array to hold 10 integers. However, when I reach the loop that prints the elements, I'm seeing garbage values for the newly allocated indices. Additionally, in some runs, the program crashes with a segmentation fault when accessing those new indices. I've tried checking for `NULL` after calling `realloc`, and I've ensured I'm using it correctly, but the scenario continues. I'm compiling the code with `gcc version 10.2.1` on Ubuntu 20.04. What could be causing this scenario, and how can I safely resize my array without running into memory corruption? How would you solve this?