在井字游戏中检查胜利

Question

Hello I'm 17 and trying to learn how to code. I am having trouble debugging this section of code and would appreciate some help.

bool checkifwin(char grid[3][3], char player)
{
    if (checkverticle(char grid[3][3], char player) 
        || checkhorizontal(char grid[3][3], char player)
        || checkdiagonal( grid[3][3], player) 
       return true;
    else
       return false;
};

It says expected primary-expression before char.

Answer 1

checkverticle() is a call to a function not a declaration so you don't need the "char"s.

bool checkifwin(char grid[3][3], char player)
{
    if ( checkverticle(grid, player) || 
         checkhorizontal(grid, player) || 
         checkdiagonal( grid, player) return true;
    else return false;
};

Just some coding advice. In my opinion:

bool func()
{
    if (expr)
        return true;
    else
        return false;
}

Is not great style. I'd suggest refactoring it to:

bool func()
{
    bool result = false; // This just makes it clear the expected default.
    // You could even go as far as
    // bool result = expr  or event return expr; - although I suggest sticking with a
    // variable in case you need to debug.
    result = expr; // e.g. result = checkVert() || checkHoriz() || checkDiag();
    return result;
}

Answer 2

There is no need to give type name while calling a function.

if (checkverticle(char grid[3][3], char player) // Remove char here and in other cases

Regarding the error further you get -

checkverticle( grid[3][3] ... )

Here grid[3][3] gives you the character at that index. What you really want to pass is grid itself as others suggested. And ofcourse, be wary of the valid array indexes.

Answer 3

You're trying to pass type declarations as parameters. Try this instead:

bool checkifwin(char grid[3][3], char player)
{
  return checkverticle(grid], player) || 
    checkhorizontal(grid, player) || 
    checkdiagonal(grid, player;

};