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The C programming language made simple

Dynamically allocated multi-dimensional arrays in C

#include <stdio.h> #include <stdlib.h> #include <string.h> int main(int argc, char* argv[]) { int i; int** arr = malloc(sizeof(int*) * 3); for (i = 0; i < 3; i++) { arr[i] = malloc(sizeof(int) * 3); } arr[0][0] = 1; arr[0][1] = 2; arr[0][2] = 3; arr[1][0] = 4; arr[1][1] = 5; arr[1][2] = 6; arr[2][0] = 7; arr[2][1] = 8; arr[2][2] = 9; printf("Size is %llu\n", sizeof(arr) + size(arr[0]) * 3 + sizeof(int) * 3 * 3); // Deallocation for (i = 0; i < 3; i++) { free(arr[i]); arr[i] = NULL; } free(arr); arr = NULL; return 0; }