Functions and Procedures in C++ MCQ question and answer with solution | C++ Programimg MCQs

#include <iostream>
using namespace std;
namespace extra
{
    int i;
}
void i()
{
    using namespace extra;
    int i;
    i = 9;
    cout << i;
}
int main()
{
    enum  letter { i, j};
    class i { letter j; };
    ::i();
    return 0;
}

#include <iostream>
using namespace std;
int func(int m = 10, int n)
{
    int c;
    c = m + n;
    return c;
}
int main()
{
    cout << func(5);
    return 0;
}

#include <iostream>
using namespace std;
int mult (int x, int y)
{
    int result;
    result = 0;
    while (y != 0) 
    {
        result = result + x;
        y = y - 1;
    }
    return(result);
}
int main ()
{
    int x = 5, y = 5;
    cout  << mult(x, y) ;
   return(0);
}