Create build.yml

.github/workflows/build.yml

@@ -0,0 +1,33 @@
+name: Build Extreme Math for Windows
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+
+    runs-on: windows-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Set up MinGW for Windows
+      run: |
+        choco install mingw
+
+    - name: Compile with g++
+      run: |
+        g++ -std=c++11 -I./src/include -o build/extreme_math src/main.cpp src/logging.cpp src/equation.cpp src/tui.cpp
+
+    - name: Upload build artifact
+      uses: actions/upload-artifact@v3
+      with:
+        name: extreme-math-windows
+        path: |
+          extreme_math.exe