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

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main(int argc, char const *argv[])
{
	vector <int> v = {1,5,23,90,15,35};
	cout<<is_heap(v.begin(), v.end());
	make_heap(v.begin(), v.end());
	cout<<is_heap(v.begin(), v.end());
}

#include <iostream>
#include <functional>
#include <numeric>
using namespace std;
int myop (int x, int y) 
{
    return x + y + 1;
}
int main () 
{
    int val[] = {1, 2, 3, 4, 5};
    int result[5];
    partial_sum (val, val + 5, result);
    for (int i = 0; i < 5; i++)
        cout << result[i] << ' ';
    return 0;
}

#include <iostream>
#include <ios>
#include <istream>
#include <limits>
using namespace std;
template <typename CharT>
void ignore_line ( basic_istream<CharT>& in )
{
    in.ignore ( numeric_limits<streamsize> :: max(), in.widen ( '\n' ) );
}
int main()
{
    cout << "First input: ";
    cin.get();
    cout << "Clearing cin.\n";
    cin.clear();
    ignore_line ( cin );
    cout << "All done.\n";
}

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
void Display(const vector<int>& vi)
{
    for (size_t i = 0; i < vi.size(); ++i)
        cout << vi[i];
    cout<<endl;
}
int main()
{
    vector<int> vi;
    vi.push_back(3);
    vi.push_back(5);
    sort(vi.begin(), vi.end());
    Display(vi);
    while(next_permutation(vi.begin(), vi.end()))
    Display(vi);
    return 0;
}