I've been working on a program (nothing big, or anything) and there are some things I'd like to work (That has nothing to do with the fact that there supposed to work :)
Problems:
1 - Screen won't clear (This seems to be the most frequent question about c/c++ "ms-dos" programs, yet even when I follow all directions, it still fails me)
2 - I wan't it to be so that if a user enters invalid numbers, they recieve a message telling them of their mistake, but for some reason it ALWAYS reports an error...
[I]//Successfully compiled in Dev-Cpp (Bloodshed)[/I]
[I]//I cannot seem to remove the exponential notation :([/I]
[I]//The cls command also fails me :([/I]
[I]//I had a perfect number finder included, but it has no true use[/I]
#include <iostream>
#include <stdlib.h>
#include <math.h>
#include <iomanip>
[B]using[/B] [B]namespace[/B] std;
[B]void[/B] Menu();[B]void[/B] GetFactors();[B]int[/B] Exit();[B]void[/B] Help();[B]void[/B] PrimeFinder();
[B]int[/B] main()
{
Menu();
[B]return[/B](0);
}
[B]void[/B] GetFactors()
{
cout.unsetf(ios::scientific);
cin.unsetf(ios::scientific);
[B]long[/B] [B]double[/B] ctr = 0; [B]long[/B] [B]double[/B] Facts = 0; [B]long[/B] [B]double[/B] Number = 0; [B]long[/B] [B]double[/B] currnum = 1;
cout << "Enter a number: ";
cin >> Number;
cout << "\n\n\nFactors of " << Number << " include:\n";
[B]if[/B] (Number == 1)
{
cout << "(1 , 1)";
}
[B]for[/B] (ctr=1;currnum != 0;ctr++)
{
[B]if[/B] ((Number/ctr)==(truncl(Number/ctr)))
{
currnum += (ctr-(currnum-1));
[B]if[/B] (currnum >= (Number/ctr))
{
currnum = 0;
}
[B]if[/B] (currnum != 0)
{
cout << "(" << ctr << " , " << (Number/ctr) << ")\t";
Facts++;
}
}
[B]if[/B] (Facts >= 3)
{
cout << "\n";
Facts = 0;
}
}
cout << "\n\nPress Enter To Continue...";
cin.ignore(1);
cin.get();
Menu();
}
[B]void[/B] Menu()
{
system("CLS");
[B]int[/B] Choice = 0;
cout << "\nHello and welcome to Factor Finder\n\nEnter an option:\n\t1 - Find Factors\n\t2 - Find Prime Numbers\n\t3 - Help\n\t4 - Exit\n\tChoice: ";
cin >> Choice;
[B]switch[/B] (Choice)
{
[B]case[/B] 1:
GetFactors();
[B]break[/B];
[B]case[/B] 2:
PrimeFinder();
[B]break[/B];
[B]case[/B] 3:
Help();
[B]break[/B];
[B]case[/B] 4:
Exit();
[B]break[/B];
[B]default[/B]:
cout << "\n\n\nChoice invalid!\tEnter a new choice\n\n";
Menu();
[B]break[/B];
}
}
[I]/*[/I]
[I]void PerfectNumber()[/I]
[I]{[/I]
[I] cout.unsetf(ios::scientific);[/I]
[I] long /*double Number = 0;[/I]
[I] system("CLS");[/I]
[I] cout << "\nEnter how many numbers to check: ";[/I]
[I] cin >> Number;[/I]
[I] cout << "\n";[/I]
[I] IsPerfect(1,Number);[/I]
[I] Menu();[/I]
[I]}[/I]
[I]*/[/I]
[B]void[/B] Help()
{
system ("CLS");
cout << "\nFind Factors:\n\tFinds the factors of a given number"
<< "\n\nFind prime numbers:\n\tFinds the prime numbers within a given range."
[I]// << "\n\nCheck Prime:\n\tAllows the entry of only one number to check if it is prime."[/I]
<< "\n\nHelp:\n\tDisplays this message."
<< "\n\nExit:\n\tQuits the program."
<< "\n\nPress Enter To Continue...";
cin.ignore();
cin.get();
Menu();
}
[B]int[/B] Exit()
{
[B]return[/B](0);
}
[B]void[/B] PrimeFinder()
{
[B]bool[/B] Error = 0;
[B]bool[/B] PNum = 0;
[B]bool[/B] Pressed = 0;
[B]bool[/B] RangeHasPrime = 0;
[B]int[/B] Lines = 0;
[B]long[/B] [B]double[/B] PrimeCnt = 0;
[B]long[/B] [B]double[/B] Current = 0;
[B]long[/B] [B]double[/B] ctr = 0;
[B]long[/B] [B]double[/B] Facts = 0;
[B]long[/B] [B]double[/B] NumberMin = 0;
[B]long[/B] [B]double[/B] NumberMax = 0;
[B]long[/B] [B]double[/B] currnum = 1;
cout << "What number would you like to begin checking at: ";
cin >> NumberMin;
cout << "\nAnd what number should I search to: ";
cin >> NumberMax;
//Below is where it should check for errors, but seems to fail miserably
[I]// if (NumberMax < NumberMin)[/I]
[I]// {[/I]
[I]// Error = 1;[/I]
[I]// cout << "\nError! You cant have the number you start from be less than the one you end at.\n";[/I]
[I]// }[/I]
[I]// if ((NumberMax != truncl(NumberMax))||(NumberMin != truncl(NumberMin)))[/I]
[I]// {[/I]
[I]// Error = 1;[/I]
[I]// cout << "\nError! Your number cannot include decimals\n";[/I]
[I]// }[/I]
[I]// if (Error != 1)[/I]
[I]// {[/I]
cout << "\n\n\nPrime factors from " << NumberMin << " to " << NumberMax << " include:\n";
[B]for[/B] (Current = NumberMin;Current <= NumberMax; Current++)
{
currnum = 1;
PrimeCnt = 0;
PNum = 0;
ctr = 1;
[B]for[/B] (ctr=1;currnum < (Current/ctr);ctr++)
{
[I]// if (Current <= 1)[/I]
[I]// {[/I]
[I]// PrimeCnt = 3;[/I]
[I]// Current = 2;[/I]
[I]// }[/I]
currnum = ctr;
[B]if[/B] ((Current/ctr)==(truncl(Current/ctr)))[I]//Cant use modulus on long double[/I]
{
PrimeCnt += 2;[I]//Counts factors ([/I]
currnum = ctr;
[B]if[/B] (PrimeCnt > 2)
{
currnum = 0;
}
[B]if[/B] (currnum >= (Current/ctr))
{
currnum = 0;
}
}
}
currnum = 1;
[B]if[/B] (PrimeCnt == 2)
{
cout.unsetf(ios::scientific);
cout << Current << " , ";
RangeHasPrime = 1;
Facts++;
PrimeCnt = 0;
}
PrimeCnt = 0;
[B]if[/B] (Facts >= 8)
{
cout << "\n";
Facts = 0;
Lines += 1;
}
[B]if[/B] (Lines >= 10)
{
cout << "\nDue to the large amount of factors the program has paused to let you view them\nPress enter to continue...\n";
[B]if[/B] (Pressed == 0)
{
cin.ignore();
Pressed = 1;
}
cin.get();
Lines = 0;
}
}
[I]//}[/I]
[B]if[/B] (RangeHasPrime == 0)
{
cout << "\n\nThe range you entered contains no prime numbers.";
}
cout << "\n\nPress Enter To Continue...";
system ("CLS");
[B]if[/B] (Pressed == 0)
{
cin.ignore();
Pressed = 1;
}
cin.get();
Menu();
}If for some reason you want the code opened in a seperate window, go <a href="http://brentsite.bravehost.com/FactorFinder.html">here</a>
It was compiled with the bloodshed freeware compiler, but I assume that my code ought to work with "all" compilers, but I have no others to test it on so...
Thanks in advance
Brent
P.S.
This is probably something I should no, but what does "parse" mean...
