Ancient code: program default arguments in cpp

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HCF program default arguments in cpp, default argument

write a c++ program to find HCF of two numbers and three numbers with help of the default argument.

You must have this knowledge

basic CPP, pointer, conditional operator, loop, if-else

HCF program default arguments in cpp

// default argument example 
//this program run two times for HCF of two numbers and three number.
#include <iostream>
using namespace std;

int number1, number2;//global declartion varible

int *c = &number2;//global pointer

int HCF(int &, int &, int = *c); //*c contain address number2 varible

int main()
{

cout << "\t\t\t HCF PROGRAM" << endl
         << endl
         << endl;

cout << "Enter two number : ";
    cin >> number1 >> number2;
    cout << "HCF of two number is: " << HCF(number1, number2);
    cout << endl;
    int number3;
    cout << "Enter three number : ";
    cin >> number1 >> number2 >> number3;
    cout << "HCF of Three number is:" << HCF(number1, number2, number3);
}

int HCF(int &num1, int &num2, int num3)
{

int small;
    small = num1 < num2 ? num1 < num3 ? num1 : num3 : num2 < num3 ? num2 : num3;
    while (small)
    {
        if (num1 % small == 0 && num2 % small == 0 && num3 % small == 0)
            break;
        small--;
    }
    return (small);
}

Output Screen