Error: ISO c++ forbids declaration of ... with no type

Projects Programming
1

What does the error "ISO c++ forbids declaration of InPin with no type", where InPin is a int variable, mean?

2

Read this before posting a programming question

Post your code please. An error message without code is like a fish without a bicycle.

3

Mathmang:
What does the error "ISO c++ forbids declaration of InPin with no type", where InPin is a int variable, mean?

It means that InPin has been declared with no type, and ISO c++ forbids that.

Presumably you didn't mean to declare it with no type. Perhaps if you posted your code somebody would be able to spot how you ended up doing that.

4

I can reproduce your problem by making up my own code:

class foo 
  {
  ant * bar;  
  };

void setup () { }
void loop () { }

Gives:

sketch_jun08a:3: error: ISO C++ forbids declaration of 'ant' with no type
sketch_jun08a:3: error: expected ';' before '*' token

Now for help with your code, you need to post it.

5

I think that analogy needs a little work. :wink:

Lefty

6

retrolefty:

[quote author=Nick Gammon link=topic=170696.msg1269247#msg1269247 date=1370562906]
Read this before posting a programming question

Post your code please. An error message without code is like a fish without a bicycle.

I think that analogy needs a little work. :wink:

Lefty
[/quote]
I think you mean it's like a broken pencil.

7

retrolefty:

[quote author=Nick Gammon link=topic=170696.msg1269247#msg1269247 date=1370562906]
Read this before posting a programming question

Post your code please. An error message without code is like a fish without a bicycle.

I think that analogy needs a little work. :wink:

Lefty
[/quote]
I thought Nick's analogy was fine. A little overstatement does no harm. :wink: Besides, you do want error codes with your code, as much as a fish needs a bicycle. :astonished:

8

Msquare:

retrolefty:

[quote author=Nick Gammon link=topic=170696.msg1269247#msg1269247 date=1370562906]
Read this before posting a programming question

Post your code please. An error message without code is like a fish without a bicycle.

I think that analogy needs a little work. :wink:

Lefty

I thought Nick's analogy was fine. A little overstatement does no harm. :wink: Besides, you do want error codes with your code, as much as a fish needs a bicycle. :astonished:
[/quote]

No, it's not an overstatement, just a poor analogy. A fish with or without a bicycle is not like posting an error message without the code that caused the error. Perhaps something like:

Posting an error message without the code is like a trying to use a map to get somewhere when you have no idea where you are to start with.

Lefty

9

Mathmang:
What does the error "ISO c++ forbids declaration of InPin with no type", where InPin is a int variable, mean?

C++ is a typed language. Every identifier must have a data type. You must have an identifier in your code with no type.

10

retrolefty:
No, it's not an overstatement, just a poor analogy.

It was a jesting reference to assorted things. Try Googling "fish without a bicycle".

There's even a movie of that name.

We'll be up to page 2 at this rate, and still have no idea what the fish code looks like.

11

Yes, one might say the OP has us all by hook, line, and sinker.

Lefty

12

retrolefty:

[quote author=Nick Gammon link=topic=170696.msg1271391#msg1271391 date=1370737309]

retrolefty:
No, it's not an overstatement, just a poor analogy.

It was a jesting reference to assorted things. Try Googling "fish without a bicycle".

There's even a movie of that name.

We'll be up to page 2 at this rate, and still have no idea what the fish code looks like.

Yes, one might say the OP has us all by hook, line, and sinker.

Lefty
[/quote]
Except you can only be "got" by the hook - the line and sinker are just all about getting the hook there in the first place and are ancillary to the operation.

13

retrolefty:
Yes, one might say the OP has us all by hook, line, and sinker.

It was a funny line though.

I'm just waiting for Lefty to work a bicycle into it. :stuck_out_tongue:

14

I got nothing. :wink:

15

Maybe he's just been riding us.