Declaring a string array in class header file - compiler thinks string is variable name?
Hey everybody, I need a bit of a hand with declaring a string array in my class header file in C++.
atm it looks like this:
//Maze.h
#include <string>
class Maze
{
GLfloat mazeSize, mazeX, mazeY, mazeZ;
开发者_开发问答 string* mazeLayout;
public:
Maze ( );
void render();
};
and the constructor looks like this:
//Maze.cpp
#include <GL/gl.h>
#include "Maze.h"
#include <iostream>
#include <fstream>
Maze::Maze( )
{
cin >> mazeSize;
mazeLayout = new string[mazeSize];
mazeX = 2/mazeSize;
mazeY = 0.25;
mazeZ = 2/mazeSize;
}
I'm getting a compiler error that says:
In file included from model-view.cpp:11:
Maze.h:14: error: ISO C++ forbids declaration of ‘string’ with no type
Maze.h:14: error: expected ‘;’ before ‘*’ token
and the only sense that makes to me is that for some reason it thinks I want string as a variable name not as a type declaration.
If anybody could help me out that would be fantastic, been looking this up for a while and its giving me the shits lol.
Cheers guys
You need to qualify the name: std::string
.
Apart from that, you class design doesn’t separate concerns properly: the class should not ask user input directly. That should be a parameter to the class constructor – the actual input handling should be outside the class.
Furthermore, I hope you’re properly deleting the memory you allocated in the class destructor. It would be better not to use a raw pointer. Use a std::vector<std::string>
instead. This is much easier and safer.
Use C++ STL SGI.
Vector documentation: http://www.sgi.com/tech/stl/Vector.html
String documentation: http://www.sgi.com/tech/stl/basic_string.html
You access vector like as normal array because he have overloaded [] operator
.
But if you may add intems to a vector you must do it by the insert
function, like that:
v.insert(v.end(), new_item);
.
This code add a new_item
at ends of the vector v
.
Vector declaration you doing with std::vector<std::string>
.
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