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81.
What will be the output of the following C++ code?
#include <iostream>
using namespace std;
template <class T>
class XYZ
{
    public:
    void putPri();
    static T ipub;
    private:
    static T ipri; 
};
template <class T>
void XYZ<T>::putPri()
{
    cout << ipri++ << endl;
}
template <class T> T XYZ<T>::ipub = 1;
template <class T> T XYZ<T>::ipri = 1.2;
int main()
{
    XYZ<int> a;
    XYZ<float> b;
    a.putPri();
    cout << a.ipub << endl;
    b.putPri();
}

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82.
What will be the output of the following C++ code?
#include <iostream>
#include <complex>
using namespace std;
int main()
{
	complex <double> cn(3.0, 4.0);
	cout<<log(cn)<<endl;
	return 0;
}

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84.
How are many number of characters available in newname.txt?
#include <stdio.h>
int main ()
{
    FILE * p;
    int n = 0;
    p = fopen ("newname.txt", "rb");
    if (p == NULL) 
        perror ("Error opening file");
    else
    {
        while (fgetc(p) != EOF)
        {
            ++n;
        }
        if (feof(p)) 
        {
            printf ("%d\n", n);
        }
        else
            puts ("End-of-File was not reached.");
        fclose (p);
    }
    return 0;
}

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87.
What will be the output of the following C++ code?
#include <new>
#include <iostream>
using namespace std;
struct A 
{
    virtual ~A() {  };
    void operator delete(void* p) 
    {
        cout << "A :: operator delete" << endl;
    }
};
struct B : A 
{
    void operator delete(void* p) 
    {
        cout << "B :: operator delete" << endl;
    }
};
int main() 
{
    A* ap = new B;
    delete ap;
}

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88.
What will be the output of the following C++ code?
#include<iostream>
using namespace std;
int main()
{
    int a = 5;
    int b = 5;
    auto check = [&a]() 
    {
	a = 10;
	b = 10;
    }
    check();
    cout<<"Value of a: "<<a<<endl;
    cout<<"Value of b: "<<b<<endl;
    return 0;
}

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90.
What will be the output of the following C++ code?
#include <iostream>
#include <array>
 
using namespace std;
 
int main(int argc, char const *argv[])
{
	array<int, 5> arr1;
	arr1.fill(2);
	for(int i=0;i<5;i++)
		cout<<arr1[i];
	cout<<endl;
	return 0;
}

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