Question

Write a C++ program that does the following :

Define a class myInt that has as its single attribute an integer variable and that contains member functions for determining the following information for an object of type myInt:

A. Is it multiple of 7 , 11 , or 13.

B. Is the sum of its digits odd or even.

C. What is the square root value.

D.Is it a prime number.

E. Is it a perfect number ( The sum of the factors of a perfect number is equal to the number itself – for example : 1 + 2 + 4 + 7 + 14 = 28 , so 28 is a perfect number ).

F. All of the above.

Z. Exit Write a interface that tests your functions

NOTES:

• Just one .cpp ( Header file , implementation of header file and the interface all in one program)

• Must define a class with at least 6 functions. • Do not use arrays … etc.

• Validation on the menu selection.

• Validation on the integer value that is entered by the user.

• Free output format.

• Test your functions by entering values such as 104 , 3773 , 13 , 121 , 77 , 3075

Answer 1

#include <iostream>
#include<math.h>

using namespace std;

class Special_Number
{

private:
int myInt;

public:

Special_Number(int num)
{
this->myInt=num;
}

void isMultiple()
{

if(myInt%7==0)
{
cout<<"Its a multiple of 7"<<endl;
}
else
{
cout<<"Its not a multiple of 7"<<endl;
}

if(myInt%11==0)
{
cout<<"Its a multiple of 11"<<endl;
}
else
{
cout<<"Its not a multiple of 11"<<endl;
}

if(myInt%13==0)
{
cout<<"Its a multiple of 13"<<endl;
}
else
{
cout<<"Its not a multiple of 13"<<endl;
}

}

void sumOfDigitsOddEven()
{

int num = myInt;
int sum=0;
while(num!=0)
{
sum +=num%10;
num = num/10;
}
if(sum%2==0)
{
cout<<"Sum of digits is even"<<endl;
}
else
{
cout<<"Sum of digits is odd"<<endl;
}

}

void squareRoot()
{
cout<<"Square Root is: "<<sqrt(myInt)<<endl;
}

void perfectNumber()
{

int factorSum=0;
for(int i=1; i<=myInt/2; i++)
{

if(myInt%i==0)
{
factorSum+=i;
}
}
if(factorSum==myInt)
{

cout<<"Its a perfect number"<<endl;
}
else
{
cout<<"Its not a perfect number"<<endl;
}

}
};

int main()
{

char choice;
int number;
cout<<"Enter a number to test: ";
cin>>number;
Special_Number aNumber(number);

cout<<"A. Is it multiple of 7 , 11 , or 13."<<endl;
cout<<"B. Is the sum of its digits odd or even."<<endl;
cout<<"C. What is the square root value."<<endl;
cout<<"D.Is it a prime number."<<endl;
cout<<"E. Is it a perfect number"<<endl;
cout<<"F. All of the above."<<endl;
cout<<"Enter A, B, C, D, E, F --> ";
cin>>choice;
if (choice=='A')
{
aNumber.isMultiple();
}
else if(choice=='B')
{
aNumber.sumOfDigitsOddEven();
}
else if(choice=='C')
{
aNumber.squareRoot();
}
else if(choice=='E')
{
aNumber.perfectNumber();
}
else if(choice=='F')
{
aNumber.isMultiple();
aNumber.sumOfDigitsOddEven();
aNumber.squareRoot();
aNumber.perfectNumber();
}
else
{
cout<<"Invalid selection"<<endl;
}

}