.h
class string
{
    char* text;
    size_t size;
public:
    string(const char* text);
    ~string();
    size_t Lenght();
};
.cpp
string::string(const char* text)
{
    size = strlen(text);
    this->text = (char*)text;
}


string::~string()
{
}

size_t string::Lenght()
{
    return size;
}

.h
void print(string text);

.cpp
void print(string text)
{

}

Start builder
./Exmp/Exmp/stdlib
./Exmp/Exmp/stdlib.cpp: In function ‘io::POINT io::GetCursorPos()’:
./Exmp/Exmp/stdlib.cpp:29:10: warning: extended initializer lists only available with -std=c++11 or -std=gnu++11
   return { x, y };
          ^
./Exmp/Exmp/string
In file included from ./Exmp/Exmp/main.h:6:0,
                 from ./Exmp/Exmp/string.h:2,
                 from ./Exmp/Exmp/string.cpp:1:
./Exmp/Exmp/stdlib.h:4:12: error: variable or field ‘print’ declared void
 void print(string text);
            ^
./Exmp/Exmp/stdlib.h:4:12: error: ‘string’ was not declared in this scope
End build file