Create Beginners_-_StructStackListFunction.c

Beginners_-_StructStackListFunction.c

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+//
+// Stack and List and other data structures are not build into the c language.
+// If you need to convert code that has stacks or lists you need to write or re use code
+// for that.
+//
+// As far as I have gotten to know Clang and sources about it you need to use
+// arrays for these. A stack is a array with several functions to manipulate
+// it. Most known are Pop And Push. With making you own stack from a array
+// the Push adds the data to the highest location[0..highest] in the array. You actually
+// need to keep track of this by a counter that holds the size of your stack. (You need to 
+// create arrays in Clang at program start and thus need to estimate how large they might
+// need to be.)
+// A pop removes the highest location from the array and decreases the counter with one.
+//
+// You can write more functions to remove items from the middle of the list or stack. You then
+// need to shift or "sort" the array. 
+
+#define MAXSTACKSIZE 1024 // how large a stack do we need?
+
+#include "raylib.h"
+
+// Our stack
+static int mystacklen=0;
+typedef struct stack{
+    int x;
+    int y;
+}stack;
+
+
+
+static stack mystack[MAXSTACKSIZE]; // Here this stack is global to our program.
+
+static void push(struct stack in);
+static void pop(void);
+
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib example.");
+ 
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+    struct stack banana;
+    banana.x = 10;
+    banana.y = 20;
+    push(banana);
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if(IsKeyReleased(KEY_SPACE)){
+            struct stack banana;
+            banana.x = GetRandomValue(0,100);
+            banana.y = 20;
+            push(banana);        
+        }
+        if(IsKeyReleased(KEY_ENTER)){
+            pop();
+        }
+        
+        //----------------------------------------------------------------------------------
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+            DrawText("Press space to add to stack, enter to remove",200,10,20,DARKGRAY);
+            DrawText(FormatText("Stack size : %i",mystacklen),320,30,20,DARKGRAY);
+            for(int i=0;i<mystacklen;i++){
+                DrawText(FormatText("stack %i",mystack[i].x),0,20+i*20,20,BLACK);
+            }
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+
+
+}
+
+void pop(){
+    if(mystacklen>0)mystacklen-=1;
+}
+void push(struct stack in){
+    mystack[mystacklen] = in;
+    mystacklen+=1;    
+}