::string_concat

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

char* string_concat(const char* lhs, const char* rhs) {

    const size_t storage_size = strlen(lhs) + strlen(rhs) + 1;
    char* storage = malloc(storage_size);

    strcpy(storage, lhs);
    strcat(storage, rhs);

    return storage;

}