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

#include <iostream>
using namespace std;
int main ()
{
    int i;
    cout << "Please enter an integer value: ";
    cin >> i + 4;
    return 0;
}

#include<iostream>
#include <fstream>
using namespace std;
int main () 
{
    ofstream outfile ("test.txt");
    for (int n = 0; n < 100; n++)
    {
        outfile << n;
        outfile.flush();
    }
    cout << "Done";
    outfile.close();
    return 0;
}

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main() 
{
    string s = "spaces in text";
    s.erase(remove(s.begin(), s.end(), ' ' ), s.end() ) ;
    cout << s << endl;
}

#include<iostream>
#include<any>
using namespace std;
int main()
{
	int a = 5;
	any var = a;
	cout<<var<<endl;
	return 0;
}