Pass

Well done bae!

Only, system("clear") doesn't execute in the Windows Command Prompt. The application works, with less grace, without this statement.

Once again I fail to compile and execute your application locally. Please include instruction! I tried to link SDL2, but am too bad.

Tried to follow this tutorial with the following build commands:

• gcc main.c -I/SDL2/include -F/ -framework SDL2 -o main
• gcc main.c -I/SDL2/include -L/SDL2/lib -Wall -lmingw32 -lSDL2main -lSDL2 -o main

Here are some notes on your code:

Excessive Branching

I'm gonna give up soon.

Your code:

void
evolve(int* a) {
  //...
  XY_FOR {
    //...
    for(/*...*/) 
    for(/*...*/) {
      //...
      if(x % 5 == 0 && i == x - 1) continue;
      if(x % 5 == 4 && i == x + 1) continue;
      if((i == x && j == y) || a[neighbour] == DEAD) continue;
      n++;
    }
    //...
  }
  //...
}

Less branching:

void
evolve(int* a) {
  //...
  XY_FOR {
    //...
    for(/*...*/) 
    for(/*...*/) {
      //...
      if(!(x % 5 == 0 && i == x - 1) &&
         !(x % 5 == 4 && i == x + 1) &&
         !((i == x && j == y) || a[neighbour] == DEAD)) n++;
    }
    //...
  }
  //...
}

Spagetti

Yes, as you told.

Unused variables:

void 
SquareAddVelocity(Square *s, int x, int y, float amountX, float amountY) {
  int N = s->size;
  //...
}

void
renderD(Square* s, SDL_Renderer* gRenderer) {
  //...
  for(/*...*/)
    for(/*...*/) {
      float x = i * 1;
      float y = j * 1;
      //...
    }
}

Keep it up!

Start in main.c, reviewing system("clear"), evolve, SquareAddVelocity, and renderD alongside the existing SDL2 build commands. Done means Windows can run without the clear command, the unused variables and highlighted branching are addressed, and build instructions are included for local compilation.