Salve, io personalmente non sono un programmatore, ma mio figlio di 12 anni sta imparando da autodidatta (su win...).
Ha fatto un programmino che usa SDL, ma non riesco a compilarlo sull'Amiga (l'SDK e SDL sono installati, e riesco a compilare semplici programmini in C). Qualcuno mi può dire che cosa c'è di sbagliato?
GCC mi dice :
8.RAM Disk:> gcc main.c
/tmp/ccU5TI5g.o: In function `main':
main.c:(.text+0x38): undefined reference to `SDL_Init'
main.c:(.text+0x50): undefined reference to `SDL_SetVideoMode'
main.c:(.text+0x68): undefined reference to `SDL_WM_SetCaption'
main.c:(.text+0x7c): undefined reference to `SDL_RWFromFile'
main.c:(.text+0x8c): undefined reference to `SDL_LoadBMP_RW'
main.c:(.text+0xb0): undefined reference to `SDL_MapRGB'
main.c:(.text+0xc4): undefined reference to `SDL_SetColorKey'
main.c:(.text+0x140): undefined reference to `SDL_EnableKeyRepeat'
main.c:(.text+0x148): undefined reference to `SDL_ShowCursor'
main.c:(.text+0x158): undefined reference to `SDL_WaitEvent'
main.c:(.text+0x248): undefined reference to `SDL_WarpMouse'
main.c:(.text+0x34c): undefined reference to `SDL_MapRGB'
main.c:(.text+0x360): undefined reference to `SDL_FillRect'
main.c:(.text+0x378): undefined reference to `SDL_UpperBlit'
main.c:(.text+0x380): undefined reference to `SDL_Flip'
main.c:(.text+0x394): undefined reference to `SDL_FreeSurface'
main.c:(.text+0x398): undefined reference to `SDL_Quit'
La sorgente del programma è la seguente (Zozor è un'immagine che si fa muovere col mouse):
#include <stdio.h>
#include <stdlib.h>
#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
int main(int argc, char *argv[])
{
SDL_Surface *ecran = NULL, *zozor = NULL;
SDL_Rect positionZozor;
SDL_Event event;
int continuer = 1;
SDL_Init(SDL_INIT_VIDEO);
ecran = SDL_SetVideoMode(640, 480, 32, SDL_HWSURFACE | SDL_DOUBLEBUF); /* Double Buffering */
SDL_WM_SetCaption("Gestion des évènements en SDL", NULL);
zozor = SDL_LoadBMP("zozor.bmp");
SDL_SetColorKey(zozor, SDL_SRCCOLORKEY, SDL_MapRGB(zozor->format, 0, 0, 255));
positionZozor.x = ecran->w / 2 - zozor->w / 2;
positionZozor.y = ecran->h / 2 - zozor->h / 2;
SDL_EnableKeyRepeat(1, 1); /* Activation de la répétition des touches */
SDL_ShowCursor(SDL_DISABLE);
while (continuer)
{
SDL_WaitEvent(&event);
switch(event.type)
{
case SDL_QUIT:
continuer = 0;
break;
case SDL_MOUSEBUTTONUP:
positionZozor.x = ecran->w / 2 - zozor->w / 2;
positionZozor.y = ecran->h / 2 - zozor->h / 2;
SDL_WarpMouse(positionZozor.x, positionZozor.y);
break;
case SDL_MOUSEMOTION:
positionZozor.x = event.motion.x; /* On change les coordonnées de Zozor */
positionZozor.y = event.motion.y;
break;
case SDL_KEYDOWN:
switch(event.key.keysym.sym)
{
case SDLK_ESCAPE:
continuer = 0;
break;
case SDLK_UP:
positionZozor.y--;
break;
case SDLK_DOWN:
positionZozor.y++;
break;
case SDLK_RIGHT:
positionZozor.x++;
break;
case SDLK_LEFT:
positionZozor.x--;
break;
}
break;
}
SDL_FillRect(ecran, NULL, SDL_MapRGB(ecran->format, 150, 255, 0));
SDL_BlitSurface(zozor, NULL, ecran, &positionZozor);
SDL_Flip(ecran);
}
SDL_FreeSurface(zozor);
SDL_Quit();
return EXIT_SUCCESS;
}