Question

4. Write a C++ program to find and display factors of a number. You can use either input from a user or created random number using rand() function.

Answer 1

C++ Program to Display Factors of a Number

Factors of a number are the numbers which completely divides it without leaving any remainders .

eg . Factors of 6 = 1 , 2 , 3 , 6

Steps :

1. Declare a variable ( n ) of which factors to be find .

2. Take input from the user using cin>> n ;

3. Use a for loop from i=1 to i=n and check if ( n % i ==0 ) or not .

4. if ( n % i ==0 ) that is if remainder of n divide by i is 0 then i is one of the factor of n .

5. and hence print value of ' i ' using cout<< i ;

Note:

cin is used with extraction operator ">>" to take user inputs .

cout is used with insertion operator "<<" to show the output .   

Code :

#include<iostream> /**cin/cout are object of input/output stream (iostream) **/
using namespace std;

int main()
{
int n; /** declaring the number for which numbers to find **/
cout<<"Enter the number :" ;
cin>> n ; /** Taking input from user **/
cout<<"Factors of "<< n <<": ";
for(int i=1;i<=n;i++) /** for loop run from i=1 to i=n **/
{
if(n%i==0)
{
cout<< i<<" " ; /** if i divides n it means 'i' is a factor of 'n' , hence print 'i'**/

}
}
return 0;

}

ScreenShots :

finding_factor.cpp - Code:Blocks 17.12 File Edit View Search Project Build Debug Fortran wxSmith Tools Tools+ Plugins DoxyBlocks Settings Help Start here x finding factor.cpp X Management Projects Symbols Workspace Files /**ci/cast are object of input/output stream (heat son) **/ #includeiostream) using namespace std: int main() /** declaring the number for which numbers to find **/ int n; cout<<"Enter the number :" ; cin> ; cout<<"Factors of "<<n<<": "; for (int 1- 1 - 1++) /** Taking input from user **/ /** for loop run from 1-1 to 1-n **/ if inki ) cout<< << /** if i divides n it means this is a factor of in , hence print **/ return 0:1 Logs & others Codes Blocks X Search results x Cece x Build log x Build messages x cpp Check/Vera++ X C ppreck/V + murage X Cacope x Dubugger X DaxyBlocks X Portran info Line Message --- Build file: "no target" in "no project compiler: unknown) --- - Buld finished: 0 errors), Owning(s) 0 minutes), o second(s)) -- C:\Users Yogesh\Desktopkodzing finding factor.cpp C/C++ Windows (CR+LF) default Line 19, Col 14. Pos 654 Insert Read/Write : Type here to search default E NG A 11:17 PM 11-03-20 11-03-2020

Output :

- 0 x tinding_factor.cpp - Code:Blocks 17.12 File Edit View Search Project Build Debug Fortran wxSmith Tools Tools+ Plugins DoxyBlocks Settings Help - X * CAUsers Yogesh\Desktop\kodzing finding factor exe Management Enter the number :25 Projects Symb.Factors of 25: 1 5 25 O Workspace Process returned @ (@xo) execution time: 6.510 S Press any key to continue. cic Windows (CR+LF) default Line 19, Col 14 Pos 654 Insert Read/Write A Type here to search default 11:18 PM CNG 11-03-2020 -

Taking input using rand():

rand() is a function defined inside cstdlib , which is used to generate random numbers .

If you want to take input using rand() then just include<cstdlib> and then store this random number in any variable and use it as input .

#include<cstdlib>

int n ;

n = rand() ;   

just put this code for taking input from rand() .