[C++] String type

programming
1

In PpmReader.cpp, I have:


#include "PpmReader.h"

PpmReader::PpmReader() {
	textureID = 0;
}

// line 26
int PpmReader::load(string filename) { 
        // some stuff
}

In PpmReader.h, I have:


#ifndef PPMREADER_H
#define PPMREADER_H

#include <stdio.h>
#include <malloc.h>
#include <string>
#include <GL/glut.h>

class PpmReader {
	private:
		GLuint textureID; 
	
	public:
		PpmReader();
		int load(string filename);
};

#endif

I get this error:


PpmReader.cpp(26) : error C2065: 'string' : undeclared identifier

Why? Didn’t I include the string library?