Question

I am new to programming and I have been trying to create a program that would solve any Sudoku puzzle. However, I’ve been getting a lot of errors, and in this one I just can’t figure out what’s wrong.

This is the code where the error is:

for (short o = indice;o>=divergencias[n_diver];o--){
    N=historico[o];
    P=tabela[N];  //Line 205
    tabela[N]=0;  //Line 206
    }
    indice -= divergencias[n_diver];
    n_diver --;
    }

And the errors, which happened on the lines marked with comments, are:

C:\(...)\main.cpp|205|error: invalid conversion from 'short unsigned int*' to 'short unsigned int'|

and

C:\(...)\main.cpp|206|error: incompatible types in assignment of 'int' to 'short unsigned int [9]'|

I’ve been searching for this error, and didn’t find any satisfying answer to it. Moreover, the website in which I learn what I know about programming specifies that writing something like b = billy [a+2]; is valid. So I just can’t understand what’s wrong with this…

Answer 1

It looks like tabela is declared as short unsigned tabela[9][9]. In order to get an item of type unsigned short from it you have to provide two indexes, not one.

On the other hand, if you are looking to get an entire sub-array from tabela, the left side of the assignment needs to be compatible with a 1-D array of unsigned short, for example, an unsigned short* pointer.