help me with this error

Hi all!
Can somebody please tell me what the problem is with writing such a code?
c is a double and v is a vector.

Code:

v.push_back(c%10);
c=-c%10;

both lines are incorrect. In the first line it draws a red line under "c" and in the second, under "-" giving the following error:
expression must have integral or enum type.

I have another question. somewhere in my program I have written:

Code:

b.num.erase(b.num.begin());

where b is an object of a defined class and num, a vector. my intention is to erase the first element of this vector but I encounter an error saying: no instance of overloaded function...matches the argument list(the object has type qualifiers that prevents the match)
and
too few arguments in function call.
what's wrong with that?

Don't talk to us about red squiggly lines because of IntelliSense. Compile the code, then copy and paste the errors exactly as they appear.

You can't use the modulus operator on a double.

the errors are what I've written already, before or after compilation, which are the following:
expression must have integral or enum type.
no instance of overloaded function...matches the argument list(the object has type qualifiers that prevents the match)
too few arguments in function call.
I've already mentioned which occurs where.

besides, I added this to my code:

Code:

static_cast<int>(c);

it still says expression must have integral or enum type.

the problem still exists. what do I do now?

Originally Posted by Farnaz

the errors are what I've written already, before or after compilation, which are the following:
expression must have integral or enum type.
no instance of overloaded function...matches the argument list(the object has type qualifiers that prevents the match)
too few arguments in function call.
I've already mentioned which occurs where.

besides, I added this to my code:

Code:

static_cast<int>(c);

it still says expression must have integral or enum type.

the problem still exists. what do I do now?

I am a C programmer and I know that adding an line of code like you posted does nothing to how the variable "c" is treated in any other line of code.

Post the lines of code with the errors in them!!!!
Post the lines of code that declare the variable used in the line with errors!!!
Post the error message!!!
Do the posting all in the same post!!!

Tim S.