#include "c_string.h"
#include <algorithm>
#include <cstddef>
using std::copy;
using std::string;
char *string_from(const string &str) {
size_t size = str.size();
char *result = new char[size + 1];
if (result == nullptr) {
return result;
}
copy(str.begin(), str.end(), result);
result[size] = '\0';
return result;
}
void string_delete(char *str) {
delete[] str;
}