Irreterende problem!

C kode 

 #ifndef SPRITELIB_H_
 #define SPRITELIB_H_
 
 #include "SDL/SDL.h"
 #include "SDL/SDL_image.h"
 #include <string>
 #include <map>
 
 class SpriteLib {
 private:
     map<string, SDL_Surface*> images;
     SDL_Surface* loadImage(string filePath);
 public:
     SpriteLib();
     virtual ~SpriteLib();
 
     SDL_Surface* getImage(string filePath);
 };
 
 #endif

C kode 

 #include "SpriteLib.h"
 
 SpriteLib::SpriteLib() {}
 SpriteLib::~SpriteLib() {}
 
 SDL_Surface* SpriteLib::loadImage(string filePath) {
         SDL_Surface* loadedImage = NULL;
         SDL_Surface* optimizedImage = NULL;
 
         loadedImage = SDL_LoadBMP( filename.c_str() );
 
         if( loadedImage != NULL )
         {
             optimizedImage = SDL_DisplayFormat( loadedImage );
 
             SDL_FreeSurface( loadedImage );
         }
         return optimizedImage;
 }
 
 SDL_Surface* getImage(string filePath) {
     if(images[filePath] == NULL) {
         images[filePath] = loadImage(filePath);
     }
     return images[filePath];
 }

Kode 

**** Build of configuration Debug for project SDLappOne ****

**** Internal Builder is used for build               ****
g++ -O0 -g3 -Wall -c -fmessage-length=0 -osrc\SpriteLib.o ..\src\SpriteLib.cpp
In file included from ..\src\SpriteLib.cpp:8:
..\src\SpriteLib.h:18: error: ISO C++ forbids declaration of `map' with no type
..\src\SpriteLib.h:18: error: expected `;' before '<' token
..\src\SpriteLib.h:19: error: expected `;' before '(' token
..\src\SpriteLib.h:24: error: expected `;' before '(' token
..\src\SpriteLib.cpp:19: error: `SDL_Surface*SpriteLib::loadImage' is not a static member of `class SpriteLib'
..\src\SpriteLib.cpp:19: error: `string' was not declared in this scope
..\src\SpriteLib.cpp:19: error: expected `,' or `;' before '{' token
..\src\SpriteLib.cpp:34: error: `string' was not declared in this scope
..\src\SpriteLib.cpp:34: error: expected `,' or `;' before '{' token
Build error occurred, build is stopped
Time consumed: 270  ms.