What is wrong with my struct??

What is wrong with my struct??

Greg Martin

Member #7,208

May 2006

I'm having a little trouble with my code. I'm posting my entire source code below just so I cover myself and alleviate any confusion. I'm using Win2000 with the latest release of DevC++.

1#include <allegro.h>
2#include <stdlib.h>
3#include <stdio.h>
4#include <time.h>
5#include "tankFrames.h"
6 
7/* TYPEDEFS */
8typedef BITMAP bmp;
9typedef DATAFILE dat;
10 
11/* ENUMERATIONS */
12enum tankDirection {DIR_NORTH, DIR_SOUTH, DIR_EAST, DIR_WEST};
13 
14/* GLOBAL VARIABLES */
15volatile long speed = 0;
16volatile long animPace = 0;
17dat *tankSprites;
18bmp *imgBackBuffer;
19 
20/* STRUCTS */
21struct tank{
22    tankDirection dir;
23    int x;
24    int y;
25    bmp *stillFrame;
26    bmp *northAnimFrame0;
27    bmp *northAnimFrame1;
28    bmp *northAnimFrame2;
29    bmp *northAnimFrame3;
30    bmp *northAnimFrame4;
31    bmp *northAnimFrame5;
32    bmp *northAnimFrame6;
33    bmp *northAnimFrame7;
34};
35 
36/* INCSPEED FUNCTION DEFINTION */
37void incSpeed(){
38    speed++;
39}
40END_OF_FUNCTION(incSpeed);
41 
42/* INIT FUNCTION DEFINITION */
43void init(){
44    /*
45     * TODO:
46     * Initialize Allegro
47     * Set the graphics mode and color depth
48     * Install the keyboard and timer devices
49     * Lock all memory used by timer routines
50     * Load the necessary datafiles into memory
51     */
52    allegro_init();
53    LOCK_VARIABLE(speed);
54    LOCK_FUNCTION(incSpeed);
55    set_gfx_mode(GFX_AUTODETECT_WINDOWED, 640, 480, 0, 0);
56    set_color_depth(16);
57    install_keyboard();
58    install_timer();
59    install_int_ex(incSpeed, BPS_TO_TIMER(60));
60    tankSprites = load_datafile("tankFrames.dat");
61    imgBackBuffer = create_bitmap(SCREEN_W, SCREEN_H);
62    srand(time('\0'));
63}
64END_OF_FUNCTION(init);
65 
66/* DEINIT FUNCTION DEFINITION */
67void deinit(){
68    /*
69     * TODO:
70     * Clear the key buffer
71     * Destroy all bitmaps
72     * Destroy all MIDIs
73     * Set all variables to null or zero
74     */
75    clear_keybuf();
76    destroy_bitmap(imgBackBuffer);
77    unload_datafile(tankSprites);
78}
79END_OF_FUNCTION(deinit);
80 
81/* TANKANIMNORTH FUNCTION DEFINITION *//*
82void tankAnimNorth(struct tank *temp){
83    while(animPace <= 24){
84        if(animPace < 3)
85            draw_sprite(imgBackBuffer, temp->northAnimFrame0, temp->x, temp->y);
86        else if(animPace >= 3 && animPace < 6)
87            draw_sprite(imgBackBuffer, temp->northAnimFrame1, temp->x, temp->y);
88        else if(animPace >= 6 && animPace < 9)
89            draw_sprite(imgBackBuffer, temp->northAnimFrame2, temp->x, temp->y);
90        else if(animPace >= 9 && animPace < 12)
91            draw_sprite(imgBackBuffer, temp->northAnimFrame3, temp->x, temp->y);
92        else if(animPace >= 12 && animPace < 15)
93            draw_sprite(imgBackBuffer, temp->northAnimFrame4, temp->x, temp->y);
94        else if(animPace >= 15 && animPace < 18)
95            draw_sprite(imgBackBuffer, temp->northAnimFrame5, temp->x, temp->y);
96        else if(animPace >= 18 && animPace < 21)
97            draw_sprite(imgBackBuffer, temp->northAnimFrame6, temp->x, temp->y);
98        else if(animPace >= 21 && animPace < 24)
99            draw_sprite(imgBackBuffer, temp->northAnimFrame7, temp->x, temp->y);
100    }
101}*/
102 
103/* INITTANK FUNCTION DEFINITION */
104void initTank(struct tank *temp, int x, int y){
105    temp->x = x;
106    temp->y = y;
107    temp->stillFrame = tankSprites[tankNorthFrame0].dat;
108    temp->northAnimFrame0 = tankSprites[tankNorthFrame0].dat;
109    temp->northAnimFrame1 = tankSprites[tankNorthFrame1].dat;
110    temp->northAnimFrame2 = tankSprites[tankNorthFrame2].dat;
111    temp->northAnimFrame3 = tankSprites[tankNorthFrame3].dat;
112    temp->northAnimFrame4 = tankSprites[tankNorthFrame4].dat;
113    temp->northAnimFrame5 = tankSprites[tankNorthFrame5].dat;
114    temp->northAnimFrame6 = tankSprites[tankNorthFrame6].dat;
115    temp->northAnimFrame7 = tankSprites[tankNorthFrame7].dat;
116}
117END_OF_FUNCTION(initTank);
118 
119/* MAIN FUNCTION */
120int main(){
121    init();
122    
123    struct tank p1;
124    
125    initTank(&p1, 50, 50);
126        
127    while(!key[KEY_ESC]){
128        while(speed > 0){
129            /*
130             * TODO:
131             * This is the processing loop for all of the game changing data
132             */
133            speed--;
134        }
135        
136        /*
137         * TODO:
138         * This is where all of the drawing in the game takes place
139         */
140        blit(imgBackBuffer, screen, 0, 0, 0, 0, imgBackBuffer->w, imgBackBuffer->h);
141        clear_bitmap(imgBackBuffer);
142    }
143    
144    deinit();
145    return 0;
146}
147END_OF_MAIN()

My problem is with the struct tank. When the first line of the struct that says tankDirection dir; isn't there or commented out, the program compiles fine. However, if I add the line, the compiler says there's a syntax error before tankDirection and says there is no semicolon at end of struct or union. Why is it doing that??

ReyBrujo

Moderator

January 2001

If you are using C, you need to define the variable dir as enum tankDirection instead of just tankDirection.

--
RB
光子「あたしただ…奪う側に回ろうと思っただけよ」
Mitsuko's last words, Battle Royale

BAF

Member #2,981

December 2002

Or typedef it:

typedef enum {DIR_NORTH, DIR_SOUTH, DIR_EAST, DIR_WEST} tankDirection;

BAF.zone | SantaHack!

James Stanley

Member #7,275

May 2006

Or in the declaration use:

typedef enum tankDirection {DIR_NORTH, DIR_SOUTH, DIR_EAST, DIR_WEST} tankDirection;

Do the same for the struct as well. It makes things easier.

EDIT:
Beaten