Combining strings for output

[JasonLpz]

OK im reading a book called

C++ Weekend Crash Course

I know in c++ console to combine a string or seperate value's
you use

cout << nVal1 << " Is the same as "<< nVal2

But how do i do this in c++ window? Is it the same?
Also is it possible to make like a dos window? More specifically
is it possible to make a console sort of like a window? ill post a pic in this post to explain.


Thats the EDIT window or program in dos.

[CornedBee]

cout << nVal1 << " Is the same as "<< nVal2;

That's a common misconception. You're not concatenating strings here. You outputting several strings and other values sequentially. They simply show up next to each other in the console window, but that's not really a necessity.

You can concatenate the string class using the + operator:

sting s1("Hello"), s2("World!"), s3;
s3 = s1 + ", " + s2;
cout << s3 << endl;

You can also build a string from strings and other data using the stringstream classes.

#include <sstream>
using namespace std;

ostringstream oss;
oss << "Hello, you're the " << nNum << "th visitor.";
cout << oss.str();

As for the edit app, you'll notice that "graphic" elements are really characters from the IBM charset (known as OEM charset in windows). So it's just good placement of characters (don't know how to color them though).

[JasonLpz]

I cant get the below to work

sting s1("Hello"), s2("World!"), s3;
s3 = s1 + ", " + s2;
cout << s3 << endl;

i though you just made a typo on sting = string but still no good

string s1("Hello"), s2("World!"), s3;
s3 = s1 + ", " + s2;
cout << s3 << endl;

And the other one i tried but nothings working what did i do now?

#include <stdio.h>
#include <iostream.h>
#include <sstream>
using namespace std;
 
 
 
int main (int nArgs, char* pszArgs[])
{
 
 
int nNum = 2;
 
ostringstream oss;
oss << "Hello, you're the " << nNum << "th visitor.";
cout << oss.str();
 
 
return 0;
}

thanks and also how will this work in VC++. Win32 Application (window) or MFC

[sunburnt]

You will also need to include the <string> header.

[parksie]

Also, you must use <iostream> and <cstdio>. Actually, <cstdio> has no place in a C++ program, don't use it.

[JasonLpz]

ok i tried but no good.

#include <stdio.h>
#include <iostream.h>
#include <sstream>
#include <string>
 
using namespace std;
 
int main (int nArgs, char* pszArgs[])
{
 
string s1("Hello"), s2("World!"), s3;
s3 = s1 + ", " + s2;
cout << s3 << endl;
 
 
return 0;
}

[CornedBee]

<iostream>, not <iostream.h>.

<iostream.h> is outdated.

[JasonLpz]

Great thanks alot

[JasonLpz]

ok how do i convert a
string <- to a -> char ?

[parksie]

If you need it, you can get a const pointer using .c_str() on the string. If you want to actually get a copy, then you'll need to do:

char buf = new char[str.length() + 1];
strcpy(buf, str.c_str());
buf[str.length()] = 0; // null termination

// use buf

delete[] buf;

[JasonLpz]

ok i got confused in that peice of code where would i put my string?

(edited)
OK sorry i didnt study that to hard

const char *ptr1 = 0;
ptr1= vIni.data ( );

i used the above and got it thank you so much you people are great

[CornedBee]

parksie: strcpy automatically 0-terminates the string for you.

[parksie]

Does it? Force of habit I think

[CornedBee]

The CRT string functions will happily create access violation due to buffer overflows, but they manage the NUL really well.

[parksie]

I think it was about 5 years ago I got into the habit of scattering null terminators around my code just in case Haven't had a problem yet

(I really oughta start trusting the libraries...)