sams C++ 21 days code error

Hi, im new to C++ and im using sams teach youself C++ in 21 days fifth edition to help me learn.

Iv just got to the end of day one and an one of the excersises it to guess what the code does before we run it, but when i did compile an run it i had some problems.. This is the code..

Code:

---

#include <iostream>
int main()
{
    int x = 5;
    int y = 7;
    std::cout << end1;
    std::cout << x + y << " " << x * y;
    std::cout << end;
    char response;
    std::cin >>response;
    return 0;
}

---

Im using Bloodshed dev and these are the errors i got..

line 4 'end1' undeclared (first use this function)

and

line 8 'end' undeclared (first use this function).

It may be something simple but im completely new to this so i wouldnt know..

Any help would be greatly appreciated.

Thanks :)

The endline function is not "end1". It's endl and it belongs to namespace std, just like cout and cin, so you have to change it to std::endl.

Thanks for the fast reply :).

i changed it to this now

Code:

---

#include <iostream>
int main()
{
    int x = 5;
    int y = 7;
    std::endl;
    std::cout << x + y << " " << x * y;
    std::cout << end;
    char response;
    std::cin >>response;
    return 0;
}

---

but now i have an error saying

line 6 statement cannot resolve address of overloaded function

and

line 8 'end' undeclared (first use this function).

Sorry if im just being dumb..

Thanks :)

Quote:

---

Originally Posted by marbles

Thanks for the fast reply :).

i changed it to this now

Code:

---

#include <iostream>
int main()
{
    int x = 5;
    int y = 7;
    std::endl;
    std::cout << x + y << " " << x * y;
    std::cout << end;
    char response;
    std::cin >>response;
    return 0;
}

---

but now i have an error saying

line 6 statement cannot resolve address of overloaded function

and

line 8 'end' undeclared (first use this function).

Sorry if im just being dumb..

Thanks :)

---

Where are you delcaring 'end'? You need to declare it before you can use it.

You need to use

Code:

---

std::cout << std::endl;

---

or just

Code:

---

std::cout << "\n";

---

if you want a new line

ok, again thanks for the fast reply, the error on line 6 has gone now :)

what does

Code:

---

std::cout << std::endl;

---

actually do?

I still have the same one on line 8 though lol =/


thanks a lot for the help

Quote:

---

Originally Posted by marbles

ok, again thanks for the fast reply, the error on line 6 has gone now :)

what does

Code:

---

std::cout << std::endl;

---

actually do?

I still have the same one on line 8 though lol =/


thanks a lot for the help

---

It simply puts a new-line character into the stream, and it also flushes the buffer.

You have to declare the variable you want to use. For example,

Code:

---

int myvariable;

---

Or in your case,

Code:

---

int end;

---

However, I don't know what you're trying to do by displaying an empty variable

ah ok.. i sorta understand..

thanks very much for your help.

i now have

Code:

---

#include <iostream>
int main()
{
    int x = 5;
    int y = 7;
    std::cout << std::endl;
    int end;
    std::cout << x + y << " " << x * y;
    std::cout << "\n";
    std::cout << end;
    char response;
    std::cin >>response;
    return 0;
}

---

and it runs!

my output is

12 35
2293640

was this the expected output?

where the hell did 2293640 come from lol?

thanks

when i took out the

Code:

---

std::cout << end;

---

it take that number away so i know its that thats making that number appear, just dont know why...


thanks

Quote:

---

Originally Posted by marbles

when i took out the

Code:

---

std::cout << end;

---

it take that number away so i know its that thats making that number appear, just dont know why...


thanks

---

It's because you didn't initialize 'end' to anything. The computer simply assigns 'end' a random number. You must do,

Code:

---

int end=25;

---

or whatever you want

ohhh i seee.

Ok then, thanks so much for all your help =)!