#include<stdio.h>
#include<stdlib.h>
#include<cstring>
#include<string>
using namespace std;

char* string_append(char* original, const char* addition){
	original = (char*)realloc(original, strlen(original) + strlen(addition)+1);
	strcpy(original + strlen(original), addition);
	return original;
}

int main(){
	char *animal = (char*)malloc(4);
	strcpy(animal, "dog");
	string animalplus = "dog";

	printf("sizeof(animal) = %lu\n", sizeof(animal));
	printf("sizeof(animalplus) = %lu\n", sizeof(animalplus));
	printf("The animal is:  %s\n", animal);
	printf("The animal is:  %s\n", animalplus.c_str());

	animalplus += " that has fleas";
	animal = string_append(animal, " that fetches slippers automatically.");

	printf("\n");
	printf("sizeof(animal) = %lu\n", sizeof(animal));
	printf("sizeof(animalplus) = %lu\n", sizeof(animalplus));
	printf("The animal is:  %s\n", animal);
	printf("The animal is:  %s\n", animalplus.c_str());
	
	free(animal);
	printf("We finished\n");
	return 0;
}