C was not declared in this scope compile error

Question

New to C    In the following program I m writing I get this error   g   -o Blob blob cc blob cc  In function  int nonrecursivecountcells color     7   int  int    blob cc 41  error   grid  was not declared in this scope   Here is the code    include  lt iostream gt  enum color  BACKGROUND  ABNORMAL  TEMPORARY   const int ROW SIZE   7  const int COL SIZE   7  int nonrecursivecountcells color ROW SIZE  COL SIZE   int  int   using namespace std    int main        color grid ROW SIZE  COL SIZE          BACKGROUND  ABNORMAL  BACKGROUND  ABNORMAL  BACKGROUND  BACKGROUND  BACKGROUND          ABNORMAL  ABNORMAL  BACKGROUND  ABNORMAL  BACKGROUND  BACKGROUND  BACKGROUND           BACKGROUND  BACKGROUND  ABNORMAL  ABNORMAL  BACKGROUND  BACKGROUND  ABNORMAL            BACKGROUND  BACKGROUND  BACKGROUND  ABNORMAL  ABNORMAL  ABNORMAL  BACKGROUND             BACKGROUND  BACKGROUND  BACKGROUND  ABNORMAL  BACKGROUND  BACKGROUND  BACKGROUND              BACKGROUND  BACKGROUND  BACKGROUND  BACKGROUND  BACKGROUND  ABNORMAL  BACKGROUND               BACKGROUND  ABNORMAL  ABNORMAL  BACKGROUND  BACKGROUND  BACKGROUND  ABNORMAL        cout  lt  lt   Enter row number   lt  lt  endl     int row     cin  gt  gt  row     cout  lt  lt   Enter column number   lt  lt  endl     int column     cin  gt  gt  column      int number   nonrecursivecountcells grid  row  column      cout  lt  lt   Number off cells in the blob that contains grid    lt  lt  row  lt  lt        lt  lt  column  lt  lt     are     lt  lt  number  lt  lt  endl      return 0      int nonrecursivecountcells color ROW SIZE  COL SIZE   int row  int column      if  row  lt  0    row  gt   ROW SIZE    column  lt  0    column  gt   COL SIZE          return 0         else if  grid row  column     ABNORMAL          return 0         else         grid row  column    TEMPORARY      return 1       nonrecursivecountcells grid  row - 1  column - 1    nonrecursivecountcells grid  row - 1  column        nonrecursivecountcells grid  row - 1  column   1    nonrecursivecountcells grid  row  column   1        nonrecursivecountcells grid  row   1  column   1    nonrecursivecountcells grid  row   1  column        nonrecursivecountcells grid  row   1  column - 1    nonrecursivecountcells grid  row  column - 1           Can anyone help me out here  Thanks

User · Answer

grid is not a global  it is local to the main function  Change this   int nonrecursivecountcells color ROW SIZE  COL SIZE   int row  int column    to this   int nonrecursivecountcells color grid ROW SIZE  COL SIZE   int row  int column    Basically you forgot to give that first param a name  grid will do since it matches your code

User · Answer

The first argument to nonrecursivecountcells   doesn t have a variable name  You try to reference it as grid in the function body  so you probably want to call it grid

User · Answer

As the compiler says  grid was not declared in the scope of your function      Scope  basically means a set of curly braces   Every variable is limited to the scope in which it is declared  it cannot be accessed outside that scope    In your case  you re declaring the grid variable in your main   function and trying to use it in nonrecursivecountcells     You seem to be passing it as the argument colors however  so I suggest you just rename your uses of grid in nonrecursivecountcells   to colors   I think there may be something wrong with trying to pass the array that way  too  so you should probably investigate passing it as a pointer  unless someone else says something to the contrary

User · Answer

fix function declaration on    int nonrecursivecountcells color grid ROW SIZE  COL SIZE   int row  int column

User · Answer

What s wrong   The definition of  nonrecursivecountcells  has no parameter named grid   You need to pass the type AND variable name to the function   You only passed the type    Note if you use the name grid for the parameter  that name has nothing to do with your main   declaration of grid   You could have used any other name as well       Also you can t pass arrays as values     How to fix   The easy way to fix this is to pass a pointer to an array to the function  nonrecursivecountcells    int nonrecursivecountcells color ROW SIZE  COL SIZE   int  int     better and type safe -   int nonrecursivecountcells color   amp grid  ROW SIZE  COL SIZE   int  int     About scope   A variable created on the stack comes out of scope when the block it is declared in is terminated   A block is anything within an opening and matching closing brace   For example an if        function        while            Note I said variable and not data   For example you can allocate memory on the heap and that data will still remain valid even outside of the scope   But the variable that originally pointed to it would still come out of scope

User · Answer

grid is not present on nonrecursivecountcells s scope   Either make grid a global array  or pass it as a parameter to the function

[c++] C++ "was not declared in this scope" compile error

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