C2065 Errors on all my for loops

Question

When I try to compile my code in Visual Studio, I am getting C2065 Errors on every for loop, like this one:

int i;
    for (i = 0; i < PQntuples(res); ++i)
    {
        printf(STATISTICS_TABLE_LINE, PQgetvalue(res,i,0), PQgetvalue(res,i,1),
                PQgetvalue(res,i,2), PQgetvalue(res,i,3), PQgetvalue(res,i,4));
    }

The errors say: error C2065: 'i': undeclared identifier

As you can see, I am declaring the identifier i, but I am still getting this error. Does anyone know why?

Answer 1

Visual C does not support C99 and do not allow mix type declarations. That's the reason behind this. Now try to declare i in the beginning of your program (just C89 style) and you will get rid off from this error.