Learning C++ (on linux) - my first useable program - Tech Support Forums

crouse · January 27th, 2003, 02:13 PM

http://www.techimo.com/photo/showphoto.php?photo=2887

Above is a link to my pic I posted here. It shows my first "useable" c++ program

All it really does is figure the area of a triangle......but we all have to start somewhere

I'm just starting to learn c++ (teaching myself). Seems like the hardest part was getting started. and staying with it. I looked into this awhile back........but got busy with other things and didn't have time to pursue it much. Gonna try again.

For anyone wanting to start........... and you don't have a clue about where to start, or how........ Here is a link to some things I wrote down ,just to have for reference, on getting started. (Please keep in mind that I am just learning myself

) http://www.crouse.ws/viewforum.php?forum=22

It seems like all the books I started reading "assumed" that I knew how to run a compiler, and the commands for them etc.

vass0922 · January 27th, 2003, 02:41 PM

either that or they start out

... then open MS Visual C++...

MrFreeze · January 27th, 2003, 07:38 PM

Nice,

It's not easy starting to program under linux, but you will get there

When i started programming with linux i had a lot of core dumps... but eventually things started working

one of my projects i've never finished...
http://users.skynet.be/mrfreeze/Ama3D.png

keep up the good work

MrFreeze

stamenkd · January 27th, 2003, 07:52 PM

crouse, what text editor are you using with gcc to write the programs in? I usually use Kate, but it is a bit buggy, and crashes from time to time.

crouse · January 27th, 2003, 11:38 PM

Right now... I've been using Kate, played with Kwrite, and use bluefish for html only. I might try bluefish with c++ as I like alot of the features it has.

Eventually I might actually get into vim or emacs or something...........but right now I like the ease of Kate, or similar text editors. When I find a limitation that I can't work around I guess I'll have to switch

Martee · January 27th, 2003, 11:44 PM

Ah, the allure of the dark side. Welcome to the world of C++

crouse · January 28th, 2003, 12:09 AM

Thanks guys............ from the look of my book.......... I've got alot to learn

Years ago.......about 20....... I used to mess around with the BASIC programming language. Actually got halfway decent at it. Alot of the things look "similar". I am going to try to learn something every night........so I don't get bored and quit

Hopefully I don't get too busy either.

At least with Linux.....it isn't costing an arm and a leg to learn. It's all free except for the few books I own on c++.

Praetorian · January 28th, 2003, 12:31 AM

Dude, this is awesome. I've just started programming C++ under Linux, today!

I'm reading a book my QBasic programming teacher (Required lang. They teach it in Programming 1, and in Programming 2 you can program whatever lang you want, & under any platform. Hmm...I wonder what OS I'm gonna program for.

) gave me. It's called "How To Program C++". I wrote 3 programs today. One that prints text, one that adds two numbers, and one that does some other crap. I've already done these in QBasic, but it's different doing them in C++.

Here's my program I just finished.

Code:

#include <iostream.h>

int main()
{
        int num1, num2;
        
        cout << "Enter two integers, and I will tell you\n"
             << "the relationships they satisfy: ";
        cin >> num1 >> num2;    // Read two integers

        if ( num1 == num2 )
                cout << num1 << " is equal to " << num2 << endl;

        if ( num1 != num2 )
                cout << num1 << " is not equal to " << num2 << endl;

        if ( num1 < num2 )
                cout << num1 << " is less than " << num2 << endl;

        if ( num1 > num2 )
                cout << num1 << "is greater than " << num2 << endl;

        if ( num1 <= num2 )
                cout << num1 << " is less than or equal to "
                     << num2 << endl;

        if (num1 <= num2 )
                cout << num1 << " is greater than or equal to "
                     << num2 << endl;

        return 0;       // Indicate that the program ended successfully
}

You guys seem so much farther ahead of me, but I guess thats okay. I'm still learning.

And just FYI, I use Vim to write my programs, and G++ (not GCC. That's for C only) to compile my programs.

Give me a few mins Crouse and I'll produce a program in C++ that does the same thing yours does.

I already did it in QBasic, I just need to "port" it to C++.

crouse · January 28th, 2003, 12:37 AM

Glad I'm not the only new guy on the c++ block

I am posting most of the stuff I do on my website.......... It's slow going for me........but I do work 40-50 hrs a week and have 2 dogs 2 cats 4 kids.............. and the most understanding wife in the world

Praetorian · January 28th, 2003, 12:59 AM

Code:

#include <iostream.h>

int main()
{
        int base, height, area;

        cout << "Base of Triangle: ";

        cin >> base;

        cout << "Height of Triangle: ";

        cin >> height;

        area = ( base * height ) / 2;

        cout << "The area of the triangle is " << area << endl;
}

I haven't figured out how to pass it decimals, so it won't work if I do that.

But it works if you just pass it whole numbers.

Tell me if my code sucks or not....