noobish some-questions (first day learning c++)

1:

Code:

cout << setiosflags(ios::fixed)<<1000000000000.0 << endl;

if we skip setiosflags(ios::fixed) what will it happen

2: does

Code:

ValueSum += Value;

means

Code:

ValueSum=ValueSum+Value

3:[/code]void PrintChar(char c = '=', int n = 80)[/code]

if we call the above function from main with these 4 options what will happen

Code:

PrintChar('*', 20); PrintChar('-'); PrintChar(); PrintChar(20);

4: whats the different when we externally declare variables and how can we change them from different locations

5: i cannot understand about the new option i think it somehow bind memory blocks? is it an array or something? when do we have to unbind it? if we dont what will it happen

6: im unable to understand what substr is and how can we use it, also i cannot understand what getline() is

thanks in advance

Originally Posted by cable

if we skip setiosflags(ios::fixed) what will it happen

Try it and find out for yourself

Originally Posted by cable

2: does

Code:

ValueSum += Value;

means

Code:

ValueSum=ValueSum+Value

Once we add a semi-colon to the latter, yes, but note that due to operator overloading, what an operator normally means is not necessarily what it means.

Originally Posted by cable

3:

Code:

void PrintChar(char c = '=', int n = 80)

if we call the above function from main with these 4 options what will happen

Try them and find out for yourself

Originally Posted by cable

4: whats the different when we externally declare variables and how can we change them from different locations

5: i cannot understand about the new option i think it somehow bind memory blocks? is it an array or something? when do we have to unbind it? if we dont what will it happen

6: im unable to understand what substr is and how can we use it, also i cannot understand what getline() is

What prompted you to ask all these questions at one go? Perhaps you should be working through some structured material, e.g., a book or a tutorial.

do you recommend me any good c++ tutorial?
i have found one but it wasn't good enough

I recommend the book Accelerated C++.

Originally Posted by cable

do you recommend me any good c++ tutorial?
i have found one but it wasn't good enough

This one seems okay:

C++ Language Tutorial - C++ Documentation

It's clear, up to date, well organized and covers a lot of material.