C++ miscellaneous MCQ question and answer with solution | C++ Programimg MCQs

#include <iostream>
#include <stdarg.h>
using namespace std;
float avg( int Count, ... )
{
    va_list Numbers;
    va_start(Numbers, Count);
    int Sum = 0;
    for (int i = 0; i < Count; ++i)
        Sum += va_arg(Numbers, int);
    va_end(Numbers);
    return (Sum/Count);
}
int main()
{
    float Average = avg(10, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
    cout << Average;
    return 0;
}

#include <iostream>
#include <string>
#include <tuple>
using namespace std;
int main()
{
	tuple <int, char, string> tp;
	tp = make_tuple(4, '1', "Hello");
	cout<<tuple_size<decltype(tp)>::value;
	return 0;
}

#include <stdio.h> 
#include <ctype.h>
int main ()
{
    int i = 0;
    char str[] = "Steve Jobs\n";
    char c;
    while (str[i])
    {
        c = str[i];
        if (islower(c)) 
            c = toupper(c);
        putchar (c);
        i++;
    }
    return 0;
}