multiply

[harry 48]

111,111,111 x 111,111,111 = 12,345,678,987,654,321

[Aegis]

What are you, some kind of genius, or something?   

That's cool, anyway.

[harry 48]

a higher maths tutor at queens uni belfast

[computeruler]

Woa! Cool!

[Helpmeh]

ERROR? u h4x0rz

[harry 48]

ERROR? u h4x0rz

will not calculate   

[Helpmeh]

will not calculate   

I get 1.2345678987654e+16

[smeezekitty]

i am thinking you did it on the computer

[Helpmeh]

i am thinking you did it on the computer

iPod Touch

[kpac]

iPod Touch

Well what a coincidence!

1.2345678987654e+16

Actually the answer you should get is 1.2345679 x10^16.

[Helpmeh]

Well what a coincidence!
Actually the answer you should get is 1.2345679 x10^16.

zE+n=z*10^n
It all depends on the calculator.

[mroilfield]

i am thinking you did it on the computer

I did mine on the computer and got the correct answer.

[BC_Programmer]

Visual Basic, in the immediate window, First as a Single Precision calculation, then as Double Precision, and finally using the Decimal Variant subtype.

(note that "?n" in the immediate window is the same as "Print n")

Code: [Select]

?111111111! * 111111111!
 1.234568E+16
?111111111# * 111111111#
1.23456789876543E+16
?cdec(111111111) * cdec(111111111)
12345678987654321


[smeezekitty]

and thats why i dont use any thing based on basic

[BC_Programmer]

and thats why i dont use any thing based on basic

what's why?

[smeezekitty]

Visual Basic, in the immediate window, First as a Single Precision calculation, then as Double Precision, and finally using the Decimal Variant subtype.

(note that "?n" in the immediate window is the same as "Print n")

Code: [Select]

?111111111! * 111111111!
 1.234568E+16
?111111111# * 111111111#
1.23456789876543E+16
?cdec(111111111) * cdec(111111111)
12345678987654321
thats why

[BC_Programmer]

WHAT is why? WHAT reason?


that it gives an accurate result? Because it has an immediate window? Because Variant Subtypes are so scary and foreign to you and thus must be evil?

[smeezekitty]

heres a floating point calculator in C++

Code: [Select]

#include <iostream.h>
#include <stdio.h>
int main(){
float a,b;
cout<<"Enter first number:";
cin>>a;
cout<<"Enter second number";
cin>>b;
printf("\n*THE ANWSER IS:%0.4f*\n", (float) a+b);
return (-0);
}


[BC_Programmer]

*censored* does that have to do with anything?

let me emphasis this for you- that was NOT VB6 code

Code: [Select]

Sub Main()
    Dim A,B
    A = Cdec(Val(Inputbox$("Enter first number")))
    B=  Cdec(Val(Inputbox$("Enter second number")))
    msgbox A+B
End Sub

Additionally, it has the advantage of not causing a fatal error when you enter straight text.

AND it doesn't display the results in scientific notation (due to the use of the Variant Decimal subtype).

[smeezekitty]

here is one that doesnt cause a fatal error
if the user enters junk input

Code: [Select]

#include <iostream.h>
#include <stdio.h>
#include <stdlib.h>
int main(){
float fa,fb;
char a[24],b[24];
cout<<"Enter first number:";
cin>>a;
cout<<"Enter second number";
cin>>b;
fa=atof(a);
fb=atof(b);
printf("\n*THE ANWSER IS:%0.4f*\n", (float) fa+fb);
return (-0);
}


[BC_Programmer]

you completely missed my point... I ask you to fill in the fairly vague statement "and thats why i dont use any thing based on basic" and you come back and post some random C program. That tells me nothing about why you won't use anything based on BASIC it just tells me that you enjoy mixing the C++ iostream overloaded operator paradigm with the use of printf() for output thus requiring you to include both stdio and iostream into your program. Settle on printf and scanf or cout and cin, mixing the two is just a demonstration in incompetence (although in this case it's not crucial, it just seems strange to mix the two). And yes, cout DOES support output formatting, it's somewhere in the iostream namespace, I believe.

Additionally, regarding the "new" improved program with "security fixes"...

what happens if you enter 25 characters via cin?

or for that matter, what if you were to enter 24 characters into the second number, and then have some carefully conditioned output that changes the return address by overwriting the stack frame with a new return location... and making that new location point to a NOP sled leading into malicious code, namely a call to execute the local shell. If for some reason your program was run as an administrator then that crafted input now executes a shell window that has administrator privileges!

Dear me! This is even WORSE then it was before!

(of course nobody is A: going to run it as admin or B: use it as an attack vector, but when your writing code you have to consider all the possibilities, if a tiny addition program can contain such a large security hole, well, gee whiz, bigger programs don't stand a chance! (It'll be sendmail all over again....))

lol

[smeezekitty]

its just a demo my god
hackers are more intrested in writing there own programs
usual because they can get money from people
and run malicious code

[kpac]

hackers are more intrested in writing there own programs

Don't tell me you know how to hack...

[Aegis]

hackers are more intrested in writing there own programs

In true hacker culture, hackers are the good guys.

usual because they can get money from people
and run malicious code

Have there been any real cases of crackers blackmailing / extorting money to keep from running their code?

[smeezekitty]

i mean its a virus that they make money off too
for example Xp antispy virus
that some less experanced user may pay for
so its a virus and you just paid the hacker

[BC_Programmer]

that's not a virus... that's a rogue program... and they aren't developed by a single person in their basement, they're developed by teams of people in their basements.

[smeezekitty]

false postives and always starting to windows even if you uncheck auto start
sounds virusy to me

[kpac]

sounds virusy to me

I'd get a hearing test if I were you.

[smeezekitty]

i used a non word on purpose
calm down evreyone

[computeruler]

ya so? A rouge program and a virus are completely different, hence kpacs post

[smeezekitty]

lets just put it this way
you want to get rid of them both

[kpac]

smeezekitty, what age are you?

[harry 48]

i put in this simple post and look what it turned into a monster

[smeezekitty]

i just dont agree with BC_programmer for using basic or vb

[kpac]

i just dont agree with BC_programmer for using basic or vb

Why bring that up? Why didn't you answer my question?

[smeezekitty]

guess

[Salmon Trout]

smeezekitty, what age are you?

My guess is 9 to 11 (max). Judging by the maturity of his posts.

[Salmon Trout]

a higher maths tutor at queens uni belfast

Like I really believe that.    Student, maybe, but even that's unlikely.

[kpac]

My guess is 9 to 11 (max). Judging by the maturity of his posts.

Well, if you were to go by maturity of posts I'd say......actually I won't say.

But yeah, that sounds like a good guess.

[smeezekitty]

older

[kpac]

12?

[Salmon Trout]

smeezekitty, I have seen some annoying stupid trollish posters on this forum, but you are a rival to the very worst of them. I can't wait to get my (third) thousand posts so I can lobby to get you banned.

[harry 48]

My guess is 9 to 11 (max). Judging by the maturity of his posts.

i agree read a few more in other posts

Like I really believe that.   Student, maybe, but even that's unlikely.

salmon trout , don't be unkind to an old plumber who likes maths , and thinks he was a tutor

[kpac]

"Third"?

so I can lobby to get you banned.

No need to worry there...

[BC_Programmer]

"Third"?

yes it would be the third time...

i just dont agree with BC_programmer for using basic or vb

And I don't agree with Smeezekitty for using C compilers from the era of 5 1/4" floppies and early Madonna singles.

[smeezekitty]

actully it was shiped on 3 1/2 inch disks
it was made in 1989
its only 20 years old

[BC_Programmer]

it's only 20 years old

only.... ONLY?

Are you not aware of how much has changed programming wise in 20 years? of course not, your still programming CGA splash screens.


Optimizing compilers, Integrated debuggers, all designed for convenience. Using some old DOS compiler doesn't make you look "macho" or old school, it just makes you look like an old geezer clinging to relics of a past life that they never had, in an effort to make yourself look competent.

It fails miserably.

How many programs can you buy, on the market- in a retail store, for example - are designed for DOS? None. I cannot think of a single DOS-based application that still sells at retail. Why? Because the companies either made to windows (Lotus 123...) or were smashed out of the market by their competitors who did.

How much is knowing how to program within DOS worth to a company that creates programs for Windows, Mac OS and/or Linux? Not much.

DOS is an interesting novelty, and knowing how to use it applies to todays command-line as well- but knowing how to work with interrupts, IRQs, and so forth are meaningless in the virtualized environment of windows. Almost everything has to be relearned and in fact putting "DOS programmer" on your resume could prevent employment as they don't feel that they want to retrain yet another DOS programmer in the ways of protected mode, Virtualized hardware, and memory access modes.

[smeezekitty]

i also use MSVC 1.5 to program windows 3.1
the best windows program i have made is a bitmap viewer

[JJ 3000]

DOS is an interesting novelty, and knowing how to use it applies to todays command-line as well- but knowing how to work with interrupts, IRQs, and so forth are meaningless in the virtualized environment of windows. Almost everything has to be relearned and in fact putting "DOS programmer" on your resume could prevent employment as they don't feel that they want to retrain yet another DOS programmer in the ways of protected mode, Virtualized hardware, and memory access modes.

Not true. Many corporate environments are still using DOS based solutions- why? Because they work.

 

[BC_Programmer]

your point?

It's not new DOS based development, the companies are using the same DOS-based solution they always have, even though it both isn't supported AND in many cases, the software firm that created it has a windows version.

That has nothing to do with programming DOS, since the programming for said applications was done years ago- they work, and that's why the companies stick with them.

[smeezekitty]

lets count the advanadges of programming in dos shall we
o high speed screen writes directly to screen memory makes it faster then GDI
o your program alwasy has priorty and some other program cant kill it
o easyer to write text because you dont have to deal with the CreateFont() function and its infinte parameters
o you dont have to worry about letting other programs run; you can take all the processor power
o you dont have to worry about redrawing evreytime somone moves the window off screen
o you dont have to worry about the user resizeing the window

[BC_Programmer]

o high speed screen writes directly to screen memory makes it faster then GDI

but you need custom code for every adapter type and video mode. DirectX is more suited if you need speed then GDI.

o easyer to write text because you dont have to deal with the CreateFont() function and its infinte parameters

CreateFontInDirect() is what I use, along with the LOGFONT structure.

*well, actually, that's a lie, since I wrapped the various GDI functions into classes ages ago, so now I deal instead with CFont, CBrush, and CPen objects.

[smeezekitty]

*well, actually, that's a lie, since I wrapped the various GDI functions into classes ages ago, so now I deal instead with CFont, CBrush, and CPen objects.

thats a good idea
as for direct X no good because the code needs to compile on win32 and win16

[Aegis]

Real programmers use FORTRAN!   

::: runs away :::

[BC_Programmer]

Real programmers use FORTRAN!   

::: runs away :::

an excellent point aegis,

Aegis .EQ. cool

yay, I can write fortran!

[smeezekitty]

fortran started in 1956 is that old enough?

Code: [Select]

mov ax,4h
int 10h
xor cx,cx
PLOOP:
mov dx,100
mov ah,0ch
mov al,3
int 10h
inc cx
cmp cx,320
jl PLOOP
xor ax,ax
int 16h
mov ax,3h
int 10h
a real programmer programs in ASM