String literals and string initializations

main.c

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

int main(int argc, char* argv[]) {
    // Const string, will break
    // char *str = "Hello!";
    
    // String on the stack, will work
    // char str[] = "Hello!";
    
    // Dynamically allocated string on the heap, will work
    char *str = malloc(50, sizeof(char));
    strcpy(str, "Hello!");
    
    printf("%s\n", str);
    str[0] = 'h';
    printf("%s\n", str);
    
    // Only needed for dynamically allocated string
    free(str);
    return 0;
}