Factor of number using C++ code

msi_333 · **Posted:** Sun May 25, 2008 5:03 pm

Here is the code for a factor of integer number

Code:

#include<iostream.h>
int fact(int x);
void main()
{
   char y;
   do
   {
      int x;
      cout<<"plz,enter no."<<endl;
      cin>>x;
      cout<<fact(x)<<endl;
      cout<<"do u want to try again(y/n)?";
a:      cin>>y;
      if (y!='y' && y!='n')
      {
         cout<<"plz enter y/n";
         goto a;
      }
   }
   while(y=='y');
}
int fact(int x)
{
   int i,f=1;
   for(i=1;i<=x;i++)
      f*=i;
   return f;
}

Shimano · **Posted:** Sun Sep 07, 2008 2:45 am

Just fixed a couple of errors i saw in this code. Btw NEVER use goto statements in c++ unless you really really have to.

Code:

#include<iostream>

int fact(int x);

using namespace std;

void main()
{
   char y;
   do
   {
      int x;
      cout<<"plz,enter no."<<endl;
      cin>>x;
      cout<<fact(x)<<endl;
      cout<<"do u want to try again(y/n)?";
      cin>>y;
      while (y!='y' && y!='n')
      {
         cout<<"plz enter y/n";
         cin>>y;
      }
   }
   while(y=='y');
}
int fact(int x)
{
   int i,f=1;
   for(i=1;i<=x;i++)
      f*=i;
   return f;
}

msi_333 · **Posted:** Sun Sep 07, 2008 3:03 am

Big thanks to you "Shimano" :grin:

Atropos · **Posted:** Tue Sep 13, 2011 2:44 am

Nice work guys and on the corrections but shouldn't void main() be int main(void) big help on giving me an idea for a program i have to make though

Code:

#include<iostream>

int fact(int x);

using namespace std;

void main()
{
   char y;
   do
   {
      int x;
      cout<<"plz,enter no."<<endl;
      cin>>x;
      cout<<fact(x)<<endl;
      cout<<"do u want to try again(y/n)?";
      cin>>y;
      while (y!='y' && y!='n')
      {
         cout<<"plz enter y/n";
         cin>>y;
      }
   }
   while(y=='y');
}
int fact(int x)
{
   int i,f=1;
   for(i=1;i<=x;i++)
      f*=i;
   return f;
}

Guest · **Posted:** Mon Sep 19, 2011 1:21 am

Here is another method based off this program i did for my class. Would have added it to my other post i do not see any editing button though :/.

Code:

#include <iostream>
#include <iomanip>

using namespace std;

//GLOBAL VARIABLES
char y;
int n;
int f;
int counter = 0;

int main()
{
   do
   {
      cout<<"Enter Number to be factored:";
      cin>>n;
      cin.clear();
      cin.ignore(100,'\n');
      if(n < 0) //IF THE NUMBER IS NEGATIVE LET THE USER KNOW
      {
         cout << "Error: you must enter a positive number to factor." << endl;
      }
      for(f = 2; f <= n; f++)
      {
         if(n % f == 0)
         {
            cout << setw(10) << f;
            counter ++; //INCREASE COUNTER EVERY TIME LOOP EXECUTES
            if(counter == 4)
            {
               cout << endl; //IF COUNTER EQUALS 4 OUTPUT END LINE
               counter = 0; //RESET COUNTER TO 0 AFTER COUNTER REACHES 4
            }
         }
      }
      
      cout <<"\nWould you like to do another number (y/n)?" << endl;
      cin>>y;
      while (y!='y' && y!='n') 
      {
         cout<<"Enter y = yes or n = no:";
         cin>>y;
      } 
   }
   while(y == 'y'); //IF y WAS ENTERED START AGAIN ELSE PROGRAM WILL EXIT
}

Factor of number using C++ code

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