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Evil_Intentions
Expert Cheater
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Joined: 07 Jan 2010
Posts: 214
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 Posted: Wed Jun 02, 2010 10:49 pm Post subject: First little C++ Program |
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Here is a Fibonacci sequence generator that i made. It will create a perfectly accurate sequence no matter the length.
http://www.mediafire.com/?rzqnzynzm4u
Unzip the folder and run the program. it will ask how long of a sequence you wish to make. I don't recommend going over a million, it may take a while, but 10k should only take around 30 seconds are so. After the program is finished, a .rtf file will be created in the same folder as the program, you can open it to view your sequence.
I need testers, because I'm not sure if it is working right, so i used a different compiler.
Please report any errors.
Also, this is only my 3rd or so c++ program, i just started last week, so constructive criticism is always good 
SOURCE:
| Code: | #include <NTL/ZZ.h>
#include <fstream>
NTL_CLIENT
int main()
{
system("cls");
ZZ count;
ZZ first;
ZZ second;
ZZ third;
ofstream myfile;
myfile.open("Fib_Sequencce.rtf");
system("title Fibonacci");
system("color 4");
cout << "Please insert how many iterations you want: ";
cin >> count;
first=0;
second=1;
third=0;
system("cls");
cout << "Working...Please do not close the window.";
myfile << first << "\n" << second << "\n";
while (count >0)
{
third=first + second;
first=second;
second=third;
myfile << fixed << third << "\n";
count=count-1;
}
system("cls");
cout << "Finished!, please check the folder for your file.\n\n";
cin.get();
return 0;
}
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nwongfeiying
Grandmaster Cheater
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| Posted: Thu Jun 03, 2010 1:48 am Post subject: |
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| Expect a "system"-usage speech from one of the senior programmers.
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Flyte
Peanuts!!!!
 Reputation: 6
Joined: 19 Apr 2006
Posts: 1887
Location: Canada
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| Posted: Thu Jun 03, 2010 2:18 am Post subject: |
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| nwongfeiying wrote: | | Expect a "system"-usage speech from one of the senior programmers. |
Blah blah blah.
TL;DR - Don't use system. Ever. I will gouge your eyes out.
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Evil_Intentions
Expert Cheater
Reputation: 65
Joined: 07 Jan 2010
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| Posted: Thu Jun 03, 2010 2:49 am Post subject: |
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| Flyte wrote: | | nwongfeiying wrote: | | Expect a "system"-usage speech from one of the senior programmers. |
Blah blah blah.
TL;DR - Don't use system. Ever. I will gouge your eyes out. |
GAH...i sorry, i just started a few days ago.... is there something like, "cout.clear()" or anything similar?
And what is so bad about using "system" anyway? Some of the best c++ books use it.
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Flyte
Peanuts!!!!
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Joined: 19 Apr 2006
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Location: Canada
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| Posted: Thu Jun 03, 2010 3:22 am Post subject: |
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| Evil Intentions wrote: | GAH...i sorry, i just started a few days ago.... is there something like, "cout.clear()" or anything similar?
And what is so bad about using "system" anyway? Some of the best c++ books use it. |
There is no need to apologize. It's a common mistake for people learning.
'system()' calls are bad like 'goto' is bad. It promotes bad programming practices. If a C++ book uses it chances are it's crap.
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Evil_Intentions
Expert Cheater
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Joined: 07 Jan 2010
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| Posted: Thu Jun 03, 2010 4:51 am Post subject: |
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| Flyte wrote: | | Evil Intentions wrote: | GAH...i sorry, i just started a few days ago.... is there something like, "cout.clear()" or anything similar?
And what is so bad about using "system" anyway? Some of the best c++ books use it. |
There is no need to apologize. It's a common mistake for people learning.
'system()' calls are bad like 'goto' is bad. It promotes bad programming practices. If a C++ book uses it chances are it's crap. |
O.o then you RREEEALLYYY don't want to see my FIRST program. lots of gotos and system calls ^^
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Stylo
Grandmaster Cheater Supreme
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Location: Israel
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| Posted: Thu Jun 03, 2010 4:57 am Post subject: |
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Then u should try avoiding that command
this isn't c programming it's more batch
_________________
Stylo |
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NoMercy
Master Cheater
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| Posted: Fri Jun 04, 2010 9:01 am Post subject: |
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you should use
GetChar();
Btw, if ur book use goto statements, its a little bit old
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Evil_Intentions
Expert Cheater
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| Posted: Fri Jun 04, 2010 3:46 pm Post subject: |
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| NoMercy wrote: | you should use
GetChar();
Btw, if ur book use goto statements, its a little bit old |
Let me rephrase, the book i use has system calls in the beginning chapter. it introduces other ways later. I just havn't read enough.
and no the book doesn't use goto at all, its just something i remembered from by vbscript and batch days.
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