How do I add commas?

[DetectiveRawr]

lol this sounds silly but how do I add commas like when the program is excuting the user have to enter something in there with a comma.

EDIT: *SIGH*...... IS THERE ANY WAY TO ADD COMMA'S INSIDE THE NUMBERS AFTER I HIT ENTER TO EXECUTE IT! Here for more info:

#include <iostream>

using namespace std;

int main()
{
int pop;

cout << "Enter a population number! Must be between 8 to 9 digits.\n";
cin >> pop;

if ( pop >= 313955000 )
    cout << "United States\n";
else
    if ( pop >= 1347350000 )
        cout << "China\n";
else
    if ( pop >= 1210193422 )
        cout << "India\n";
else
    if ( pop >= 127530000 )
        cout << "Japan\n";
else
    if ( pop >= 87840000 )
        cout << "Vietnam\n";
else
    if ( pop >= 112336538 )
        cout << "Mexico";

return 0;
}

[Bibek Subedi]

Can u plz further elaborate ..

[DetectiveRawr]

There's more info!

[o3hC5Di1]

Hi there,

If it's std::cin you're using I would use a dummychar:

char dummychar;
int x,y,z;

std::cout << "Please enter x,y,z";
std::cin >> x >> dummychar >> y >> dummychar >> z;

Perhaps someone else would have a more elegant solution.
There's also scanf(), but that's not really standard c++ so it is advised against.

Edit: Hmm, i didn't see your added program before - do you mean they would enter comma's within the numbers? Because then it gets complicated, as the two values separated by a comma are in fact one and the same number, but c++ won't recognise it as such as a comma is not a numeric character.
Also, please don't start using caps because someone asks you a bit more information - in this case I may have given you wrong information because your brief problem description was inaccurate, so don't blame others for that.

Hope that helps.

All the best,
NwN

[Bibek Subedi]

You must make pop String .

[DetectiveRawr]

I haven't reach to the "char" part yet lol. So far I learned "int" and "double". However ,little on "char".. not really in depth with that stuff yet.

[modoran]

So you are trying to allow the user enter something like

123,456,789

and treat that as number 123456789 ?

If this is so, use a std::string for reading, get rid of commas using std:;string methods and a std::stringstream to convert to a number.

[Bibek Subedi]

Only using "int" and "double", you cannot do what you want to do coz , is not nemeric character.

[o3hC5Di1]

To add on Bibek Subedi's post:

This article: http://www.cplusplus.com/articles/D9j2Nwbp/ shows how to convert a string containing comma's to an int. That would require some knowledge of std::string however : http://www.cplusplus.com/doc/tutorial/variables/

All the best,
NwN

[DetectiveRawr]

Damn..... I haven't learn about "String". Maybe this is a great time to learn it!