lab4

int f(int x,int y)
{
	x=5;
	return x;
}

TreeNode * newNode(NodeKind kind)
{
	TreeNode * t = (TreeNode *)malloc(sizeof(TreeNode));
	int i;
	if (t == NULL)
	{
		;
	}
	else {
		for (i = 0; i<4; i++)
		{
			t->child[i] = NULL;
		}
		t->sibling = NULL;
		t->nodekind = kind;
 
		t->lineno = lineno;
		if (kind == OpK || kind == IntK || kind == IdK)
		{
			if (kind == IdK)
				t->attr.name = "";
		}
		if (kind == ConstK)
			t->attr.val = 0;
	}
	return t;
}

void match(TokenType expected){
    if(token==expected)
        token=GetToken();
    else
        printf("unexpected token");
}