Images don't display

My code is:

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#include <iostream>
#include <string>
#include <cstdlib>
#include <windows.h>
#include <fstream>
#include "SDL.h"
#include <map>

using namespace std;

int b, a, roomnum;

void firstroom();
void secondroom();

bool gamestatus;
bool pokemon1yn = false;
bool pokemon2yn = false;
bool pokemon3yn = false;
bool pokemon4yn = false;
bool pokemon5yn = false;
bool pokemon6yn = false;
int x, y;
    const int SCREEN_WIDTH = 10;
    const int SCREEN_HEIGHT = 11;
    int PLAYER_WIDTH = 5;
    int PLAYER_HEIGHT = 5;
    const int MAPTOTAL_HEIGHT = 11;
    const int MAPTOTAL_WIDTH = 10;
    
	SDL_Surface* floor = NULL;
	SDL_Surface* player2 = NULL;
    SDL_Surface* screen = NULL;
    
    int room;
    int xwall, ywall;
string PLAYERTOTAL_WIDTH2,PLAYERTOTAL_HEIGHT2, room3;

int PLAYERTOTAL_WIDTH, PLAYERTOTAL_HEIGHT;
    
    
    SDL_Surface *load_image( std::string filename ){
    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;
}

void apply_surface( int x, int y, SDL_Surface* source, SDL_Surface* destination )
{
    SDL_Rect offset;

    offset.x = x;
    offset.y = y;

    SDL_BlitSurface( source, NULL, destination, &offset );
}



int main( int argc, char *argv[] ) {
    
	SDL_Init(SDL_INIT_EVERYTHING);
	
	Uint8 *key;
	Uint8 *player;
    
	gamestatus = true;

	ifstream load("xlocation.txt", ios::ate);
	PLAYERTOTAL_WIDTH2 = "xlocation.txt", ios::ate;
	PLAYERTOTAL_WIDTH = atoi(PLAYERTOTAL_WIDTH2.c_str());
    load.close();

	ifstream file1("ylocation.txt", ios::ate);
	PLAYERTOTAL_HEIGHT2 = "ylocation.txt";
	PLAYERTOTAL_HEIGHT = atoi(PLAYERTOTAL_HEIGHT2.c_str());
	file1.close();

	
	SDL_WM_SetCaption("Pokemon", "Pokemon");
	screen = SDL_SetVideoMode( 640, 480, 32, SDL_HWSURFACE );
	
	while (gamestatus = true) {
          
    SDL_Flip( screen );
        PLAYERTOTAL_HEIGHT = PLAYER_HEIGHT;
		PLAYERTOTAL_WIDTH = PLAYER_WIDTH;



	ifstream roomd("room.txt", ios::ate);
	room3 = "room.txt", ios::ate;
	if (room3 == "room1")
	firstroom();
	if (room3 == "room2")
	secondroom();
    roomd.close();
    
        SDL_Surface* loadedImage2 = FALSE;
        player2 = load_image( "player.bmp" );
        apply_surface( x, y, player2, screen );
        SDL_Delay( 2500 );
    
	key = SDL_GetKeyState( FALSE );
	
    if (key[SDLK_UP]) {
	    y++; 
	     if (roomnum == 1) {
         if (y == 11) {
        if (x == 5 or 6) {
    secondroom(); }
    else if (y == 11) {
         if (x != 5 or 6) {
   y--; } }
   else if (y == 1) {
        y--;}
        else if (x == 1 or x == 10) {
             y--; }}
}}
	else if (key[SDLK_DOWN]) {
	    y--; 
        if (roomnum == 1) {
         if (y == 11) {
        if (x == 5 or 6) {
    secondroom(); }
    else if (y == 11) {
         if (x != 5 or 6) {
   y++; } }
   else if (y == 1) {
        y++;}
        else if (x == 1 or x == 10) {
             y++; }}
}}
	else if (key[SDLK_LEFT]) {
	    x--; 
        if (roomnum == 1) {
         if (y == 11) {
        if (x == 5 or 6) {
    secondroom(); }
    else if (y == 11) {
         if (x != 5 or 6) {
   x++; } }
   else if (y == 1) {
        x++;}
        else if (x == 1 or x == 10) {
             x++; }}
}}
	else if (key[SDLK_RIGHT]) {
	    x++; 
        if (roomnum == 1) {
         if (y == 11) {
        if (x == 5 or 6) {
    secondroom(); }
    else if (y == 11) {
         if (x != 5 or 6) {
   x--; } }
   else if (y == 1) {
        x--;}
        else if (x == 1 or x == 10) {
             x--; }}
}}
	else if (key[SDLK_z]) {
	}
	else if (key[SDLK_x]) {
		
	}
	else if (key[SDLK_LSHIFT]) {
		
	}
	
	else if (key[SDLK_s]) {
		ofstream file2( "ylocation.txt", ios::trunc | ios::out );
		ofstream file3( "xlocation.txt", ios::trunc | ios::out );
		ofstream file10( "room.txt", ios::trunc | ios::out );
        x = MAPTOTAL_WIDTH - PLAYERTOTAL_WIDTH;
        y = MAPTOTAL_HEIGHT - PLAYERTOTAL_HEIGHT;
        file3 << x;
        file2 << y;
        file10 << room;
		file2.close();
		file3.close();
		file10.close();
		
		if(pokemon1yn != FALSE){
		ofstream file4( "pokemon1.txt", ios::trunc | ios::out);
		
		file4.close();
	}
		if(pokemon2yn != FALSE) {
		ofstream file5( "pokemon2.txt", ios::trunc | ios::out);
		
		file5.close();
	}
		if(pokemon3yn != FALSE) {
		ofstream file6( "pokemon3.txt", ios::trunc | ios::out);
		
		file6.close();
	}
		if(pokemon4yn != FALSE) {
		ofstream file7( "pokemon4.txt", ios::trunc | ios::out);
		
		file7.close();
	}
		if(pokemon5yn != FALSE) {
		ofstream file8( "pokemon5.txt", ios::trunc | ios::out);
		
		file8.close();
	}
		if(pokemon6yn != FALSE) {
		ofstream file9("pokemon6.txt", ios::trunc | ios::out);
		
		file9.close();
	}
	
		gamestatus = false;
		
	}

		if (room3 == "room1") {
        if (x == 11) {
              if (y == 5 or y == 6) {
                    secondroom();
                    x = 0;
                    }}}
	
}

SDL_FreeSurface( player2 );
    SDL_FreeSurface( floor );
    SDL_Quit();
	system("PAUSE");
	return 0;
}

void firstroom() {
     roomnum = 1;
     floor = load_image( "walkablefloor.bmp" );
    apply_surface( 0, 0, floor, screen );
     SDL_Flip( screen );
     SDL_Delay( 2500 );
return ; } 


void secondroom(){
roomnum = 2;
return;  }



The problem is that the images don't display and the window doesn't respond. Please help. Thanks.
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	while (gamestatus = true) { // assignment

// should be

	while (gamestatus == true) { // comparison 


Perhaps you have more mistakes, but the above is what was obvious to me.

If you have problems with SDL, I would suggest that you post on the SDL forums instead.
We can help you with C++ questions, but remember that most of us never used SDL, and probably never will.

http://forums.libsdl.org/index.php
Last edited on
Thanks.

Anyone else have any help?
Anyone?
I think these lines are wrong. Check what the value of each of these variables is. For example, I don't think room3 is equal to "room1" or "room2" so floor image is never loaded.

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PLAYERTOTAL_WIDTH2 = "xlocation.txt", ios::ate;
	PLAYERTOTAL_HEIGHT2 = "ylocation.txt";
	room3 = "room.txt", ios::ate;


Also when you call apply_surface( x, y, player2, screen ); you haven't given x or y any values. Maybe the player is drawn off the screen.
Thanks for catching that.

Updated code:

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#include <iostream>
#include <string>
#include <windows.h>
#include <fstream>
#include "SDL.h"
#include <cstring>
#include <stdio.h>
using namespace std;

int b, a, roomnum;

int firstroom();
void secondroom();

SDL_Surface *load_image( std::string filename );

bool gamestatus;
bool pokemon1yn = false;
bool pokemon2yn = false;
bool pokemon3yn = false;
bool pokemon4yn = false;
bool pokemon5yn = false;
bool pokemon6yn = false;

char input_line[MAX_PATH + 1];

int x, y;
    int SCREEN_WIDTH = 10;
    int SCREEN_HEIGHT = 11;
    int PLAYER_WIDTH = 5;
    int PLAYER_HEIGHT = 5;
    int MAPTOTAL_HEIGHT = 11;
    int MAPTOTAL_WIDTH = 10;
    int hfhf = 1;
    
	SDL_Surface* floor = NULL;
	SDL_Surface* player2 = NULL;
    SDL_Surface* screen = NULL;
    
    int room;
    int xwall, ywall;
string PLAYERTOTAL_WIDTH2,PLAYERTOTAL_HEIGHT2, room3;

int PLAYERTOTAL_WIDTH, PLAYERTOTAL_HEIGHT;
    
    
    void apply_surface( int x, int y, SDL_Surface* source, SDL_Surface* destination ){
    SDL_Rect offset;
    offset.x = x;
    offset.y = y;
    SDL_BlitSurface( source, NULL, destination, &offset );
}

int main( int argc, char *argv[] ) {
    cout << "Test";
    hfhf++;
	SDL_Init(SDL_INIT_EVERYTHING);
	
	Uint8 *key;
	Uint8 *player;
    
	gamestatus = true;

	ifstream load("xlocation.txt", ios::ate);
	PLAYERTOTAL_WIDTH2 = "xlocation.txt", ios::ate;
	PLAYERTOTAL_WIDTH = atoi(PLAYERTOTAL_WIDTH2.c_str());
    load.close();

	ifstream file1("ylocation.txt", ios::ate);
	PLAYERTOTAL_HEIGHT2 = "ylocation.txt";
	PLAYERTOTAL_HEIGHT = atoi(PLAYERTOTAL_HEIGHT2.c_str());
	file1.close();

	ifstream roomd("room.txt", ios::ate);       
        roomd.getline(input_line, MAX_PATH);
	room3 = input_line;
	if (room3 == "room1") {
	firstroom(); }
	if (room3 == "room2") {
	secondroom(); }
    roomd.close();
    
	SDL_WM_SetCaption("Pokemon", "Pokemon");
	screen = SDL_SetVideoMode( 640, 480, 32, SDL_HWSURFACE );
	
	while (gamestatus == true) {
          SDL_WM_SetCaption("Pokemon2", "Pokemon2");
    if (hfhf != 1) {
             SDL_Flip( screen ); }
        PLAYERTOTAL_HEIGHT = PLAYER_HEIGHT;
		PLAYERTOTAL_WIDTH = PLAYER_WIDTH;



	
    SDL_WM_SetCaption("Pokemon6", "Pokemon6");
        player2 = load_image( "player.bmp" );
        SDL_WM_SetCaption("Pokemon7", "Pokemon7");
        
    apply_surface(PLAYERTOTAL_WIDTH, PLAYERTOTAL_HEIGHT, player2, screen );
        SDL_WM_SetCaption("Pokemon8", "Pokemon8");
        SDL_Delay( 2500 );
    
	key = SDL_GetKeyState( FALSE );
	
    if (key[SDLK_UP]) {
	    y++; 
	     if (roomnum == 1) {
         if (y == 11) {
        if (x == 5 || x == 6) {
    secondroom(); }
    else if (y == 11) {
         if (x != 5 || x != 6) {
   y--; } }
   else if (y == 1) {
        y--;}
        else if (x == 1 || x == 10) {
             y--; }}
}}
	else if (key[SDLK_DOWN]) {
	    y--; 
        if (roomnum == 1) {
         if (y == 11) {
        if (x == 5 || x == 6) {
    secondroom(); }
    else if (y == 11) {
         if (x != 5 ||  x != 6) {
   y++; } }
   else if (y == 1) {
        y++;}
        else if (x == 1 || x == 10) {
             y++; }}
}}
	else if (key[SDLK_LEFT]) {
	    x--; 
        if (roomnum == 1) {
         if (y == 11) {
        if (x == 5 || x == 6) {
    secondroom(); }
    else if (y == 11) {
         if (x != 5 || x != 6) {
   x++; } }
   else if (y == 1) {
        x++;}
        else if (x == 1 || x == 10) {
             x++; }}
}}
	else if (key[SDLK_RIGHT]) {
	    x++; 
        if (roomnum == 1) {
         if (y == 11) {
        if (x == 5 || x == 6) {
    secondroom(); }
    else if (y == 11) {
         if (x != 5 || x != 6) {
   x--; } }
   else if (y == 1) {
        x--;}
        else if (x == 1 || x == 10) {
             x--; }}
}}
	else if (key[SDLK_z]) {
	}
	else if (key[SDLK_x]) {
		
	}
	else if (key[SDLK_LSHIFT]) {
		
	}
	
	else if (key[SDLK_s]) {
		ofstream file2( "ylocation.txt", ios::trunc | ios::out );
		ofstream file3( "xlocation.txt", ios::trunc | ios::out );
		ofstream file10( "room.txt", ios::trunc | ios::out );
        x = MAPTOTAL_WIDTH - PLAYERTOTAL_WIDTH;
        y = MAPTOTAL_HEIGHT - PLAYERTOTAL_HEIGHT;
        file3 << x;
        file2 << y;
        file10 << room;
		file2.close();
		file3.close();
		file10.close();
		
		if(pokemon1yn != FALSE){
		ofstream file4( "pokemon1.txt", ios::trunc | ios::out);
		
		file4.close();
	}
		if(pokemon2yn != FALSE) {
		ofstream file5( "pokemon2.txt", ios::trunc | ios::out);
		
		file5.close();
	}
		if(pokemon3yn != FALSE) {
		ofstream file6( "pokemon3.txt", ios::trunc | ios::out);
		
		file6.close();
	}
		if(pokemon4yn != FALSE) {
		ofstream file7( "pokemon4.txt", ios::trunc | ios::out);
		
		file7.close();
	}
		if(pokemon5yn != FALSE) {
		ofstream file8( "pokemon5.txt", ios::trunc | ios::out);
		
		file8.close();
	}
		if(pokemon6yn != FALSE) {
		ofstream file9("pokemon6.txt", ios::trunc | ios::out);
		
		file9.close();
	}
	
		gamestatus = false;
		
	}

		if (room3 == "room1") {
        if (x == 11) {
              if (y == 5 || y == 6) {
                    secondroom();
                    x = 0;
                    }}}
	
}

SDL_FreeSurface( player2 );
    SDL_FreeSurface( floor );
    SDL_Quit();
	system("PAUSE");
	return 0;
}

int firstroom() {
     SDL_WM_SetCaption("Pokemon3", "Pokemon3");
     roomnum = 1;
     floor = load_image( "walkablefloor.bmp" );
    apply_surface( 250, 275, floor, screen );
     SDL_Flip( screen );
     SDL_Delay( 2500 );
     SDL_WM_SetCaption("Pokemon4", "Pokemon4");
     return 0; } 


void secondroom(){
roomnum = 2;
return;  }

SDL_Surface *load_image( std::string filename ){
    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;
}

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