add raygui example

.gitignore

@@ -1,8 +1 @@
 app
-
-*.o
-*.d
-*.i
-*.s
-*.so
-*.a

Makefile

@@ -1,21 +1,28 @@
-all: app
+TARGET = app
+CC = gcc -std=c23 -ggdb -Wall -Wextra -pedantic -O0
+INC = -I./raylib/include
+LIB_PATH = -L./raylib/lib
+LIBS = -lraylib \
+	   -lm
 
-app: main.c
-	@gcc -std=c23 -ggdb -Wall -Wextra -pedantic -O0 main.c -o app
+all: $(TARGET)
+
+$(TARGET): main.c
+	@$(CC) $(INC) $(LIB_PATH) main.c -o $(TARGET) $(LIBS)
 
 .PHONY: clean run test debug
 
 clean:
-	@rm -rf app
+	@rm -rf $(TARGET)
 
-run: app
-	-@./app
-	@rm -rf app
+run: $(TARGET)
+	-@./$(TARGET)
+	@rm -rf $(TARGET)
 
-test: app
-	@valgrind ./app
-	@rm -rf app
+test: $(TARGET)
+	@valgrind ./$(TARGET)
+	@rm -rf $(TARGET)
 
-debug: app
-	@gdb ./app
-	@rm -rf app
+debug: $(TARGET)
+	@gdb ./$(TARGET)
+	@rm -rf $(TARGET)

main.c

@@ -1,7 +1,40 @@
 #include <stdio.h>
 
+#include "raylib.h"
+#define RAYGUI_IMPLEMENTATION
+#include "raygui.h"
+
 int main(void) {
-    printf("Hello\n");
+    InitWindow(400, 200, "App");
+    SetTargetFPS(60);
+
+    bool showMessageBox = false;
+
+    while (!WindowShouldClose()) {
+        BeginDrawing();
+        ClearBackground(GetColor(GuiGetStyle(DEFAULT, BACKGROUND_COLOR)));
+
+        if (GuiButton((Rectangle){24, 24, 120, 30}, "#191Show Message")) {
+            showMessageBox = true;
+        }
+
+        if (showMessageBox) {
+            int result = GuiMessageBox(
+                (Rectangle){85, 70, 250, 100},
+                "#191Message Box",
+                "Hi! This is a message!",
+                "Nice;Cool"
+            );
+
+            if (result >= 0) {
+                showMessageBox = false;
+            }
+        }
+
+        EndDrawing();
+    }
+
+    CloseWindow();
 
     return 0;
 }