malloc in C: Speicher dynamisch reservieren

malloc in C: Speicher dynamisch reservieren (malloc c): practical C programming guide with runnable standard C17 source code that you can edit, compile, and test directly in your browser.

1. malloc in C: Speicher dynamisch reservieren

This guide covers malloc c in standard C (C17) with clear syntax rules and practical compiler patterns. You can run and modify the complete C program below in the online GCC compiler without installing a local IDE.

2. malloc c — Syntax & Best Practices

When working with malloc c, always compile with -Wall -Wextra, initialize variables before reading them, and verify input/boundary conditions to prevent undefined behavior.

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

int main(void) {
    int *arr = malloc(3 * sizeof *arr);
    if (!arr) return 1;
    arr[0] = 10; arr[1] = 20; arr[2] = 30;
    printf("%d %d %d\n", arr[0], arr[1], arr[2]);
    free(arr);
    return 0;
}