What is wrong with my c++ code?

I can't for the life of me figure out what is wrong with this.

for(int y=0; y<FileLength; y++)
{
for(int z=0; z<254; z++); //(b)
{
if(FileData[y] == KeyCodes[z]) //(a)
cout << (char)z;
};
};

I get this error when compiling:
(a) name lookup of `z' changed for new ISO `for' scoping
(b) using obsolete binding at `z'

a and b indicate the lines that the errors point to in my compiler. I am using the Dev-C++ 4.9.9.2 beta.
Any help is appreciated thanks.

Wow. I've read that over like a thousand times and never saw that semicolon. That fixed it. Thanks.

i'm a rookie, but are you sure there is supposed to be a ; (semicolen) ending line (b) ?

isn't line (a) supposed to end in { for the statement on the next line?

for(int y=0; y<FileLength; y++)
{
for(int z=0; z<254; z++) //(b)
{
if(FileData[y] == KeyCodes[z]) { //(a)
cout << (char)z; };
};
};

I suspect there's another definition of z earlier in the function. I'd change the variable in the loop.

Hope that helps.

Edit: The next answerer pointed out the problem: The stray semicolon provides the loop with an empty statement, therefore the now-detached if statement following it is using an obsolete variable.(z).

That dev c++ version is in beta I've had similar problems, you should just use a later version, and listen to cluck, his code seems to work.

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