String.cpp

#include <string>
#include <iostream>

class String
{
private:
    char* m_data;
public:
    String(const char* cstr=0);
    String(const String& str);
    String& operator=(const String& str);
    ~String();
    char* get_c_str() const {return this->m_data;}
};


inline String::String(const char* cstr){
    if (cstr){
        m_data = new char[strlen(cstr) + 1];
        strcpy(m_data, cstr);
    }

    else{
        m_data = new char[1];
        *m_data = '\0';
    }

}

inline String::String(const String& str){
    m_data = new char[strlen(str.m_data) + 1];
    strcpy(m_data, str.m_data);

}

inline String::~String(){
    delete[] m_data;

}

inline String& String::operator=(const String& str){
    if (this == &str){
        return *this;
    }
    delete[] m_data;
    m_data = new char[strlen(str.m_data) + 1];
    strcpy(m_data, str.m_data);
    return *this;

}

std::ostream& operator<<(std::ostream& os, const String str){
    os << str.get_c_str();
    return os;
}

int main(){
    char ptr[] = "Hello\0";
    String c(ptr);

    std::cout << c;
    return 0;
}