Loaded in shader source code from file

shaders/frag.glsl

@@ -0,0 +1,7 @@
+#version 330 core
+out vec4 FragColor;
+
+void main()
+{
+   FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
+}

shaders/vert.glsl

@@ -0,0 +1,8 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+
+void main()
+{
+  gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);
+}
+

src/main.c

@@ -9,26 +9,15 @@
 const unsigned int SCR_WIDTH = 800;
 const unsigned int SCR_HEIGHT = 600;
 
-const char *vertexShaderSource =
-    "#version 330 core\n"
-    "layout (location = 0) in vec3 aPos;\n"
-    "void main()\n"
-    "{\n"
-    "   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
-    "}\0";
-const char *fragmentShaderSource =
-    "#version 330 core\n"
-    "out vec4 FragColor;\n"
-    "void main()\n"
-    "{\n"
-    "   FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
-    "}\n\0";
-
 int main(int argc, char *argv[]) {
   SDL_Window *window;
   SDL_Renderer *renderer;
+  SDL_GLContext glcontext;
   SDL_Event event;
 
+  const char *vertexShaderSource = SDL_LoadFile("shaders/vert.glsl", NULL);
+  const char *fragmentShaderSource = SDL_LoadFile("shaders/frag.glsl", NULL);
+
   if (!SDL_Init(SDL_INIT_VIDEO)) {
     SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s",
                  SDL_GetError());
@@ -47,7 +36,7 @@ int main(int argc, char *argv[]) {
                  SDL_GetError());
     return EXIT_FAILURE;
   }
-  SDL_GLContext glcontext = SDL_GL_CreateContext(window);
+  glcontext = SDL_GL_CreateContext(window);
   if (!glcontext) {
     SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
                  "Couldn't create OpenGL Context: %s", SDL_GetError());
@@ -89,6 +78,9 @@ int main(int argc, char *argv[]) {
     SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
                  "Failed to compile fragment shader: %s", infoLog);
   }
+  // Free source code memory
+  SDL_free((void *)vertexShaderSource);
+  SDL_free((void *)fragmentShaderSource);
   // link shaders
   unsigned int shaderProgram = glCreateProgram();
   glAttachShader(shaderProgram, vertexShader);