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Something extra - - A C++ factoring program: ( version 2 )

page last modified 19 August 2003

This program will display the factors of a number, and the sums and differences of the factors. It should complile fine on RedHat 8.0 ( 2.4.18-14). If you are just starting and want to learn this would be a good start. It is not intended to be used as anything other than an example. It is not necessarily an example of good coding,either. If you want something quick and just need to know the sums, differences, and factors of numbers its ok.

You can copy and paste it into an editor, save it and compile from there. To compile: name it factor.cpp then type < g++ -o factor factor.cpp > (not the < or the >) then hit enter. When your command prompt returns type < ./factor > and hit enter then follow the directions.

//copy the part below this #include <iostream> using namespace std; int FactCount(int nLoopCount); /*simple factoring program written by David Tarsi.Will function well on a machine with at least 64 megs of ram at around 400 mhz. gets slow above inputs over 36000.Any suggestions welcome at dtarsi@premier1.net Any one may use this program providing this documentation is included.The author assumes absolutely no responsibility whatsoever for any consequenses or damages resulting from the use of this program */ int main() { int input; cout << "Enter Number to be factored:\n"; cin >> input; FactCount(input); return 0; } int FactCount(int nLoopCount){ int nFirst; if(nLoopCount > 1000000){ //prevent long loop count nLoopCount = 0; cout << "Number to be factored must be less than 1000000:\n"; } for (int j=2; j <= nLoopCount; j++){ //loops through int and stops a point set by nLoopCount for (int i=2; i <=nLoopCount; i++){ //loops through the other number in the factors nFirst = j*i; //multiplies the 2 numbers together nLoopCount times if(nFirst > 1000000) break; if(nFirst == nLoopCount){ //sort out the numbers we want cout << j <<" * "<< i <<" = "<< nFirst << " sum of factors = "<< j+i << " difference of factors = " << j-i << " , " << i-j << "\n"; //display result if(j < i) break; return 0; } } } } //copy the part above this

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Copyright (c) 2002 David Tarsi.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

A copy of the license is included in the section entitled "GNU GPL".

A copy of the license is included in the section entitled "GNU GPL".

he license is included in the section entitled "GNU GPL".