CPP Exam Questions & Answers

What happens when you attempt to compile and run the following code?

#include

#include

#include

using namespace std;

templatestruct Out {

ostream & out;

Out(ostream & o): out(o){}

void operator() (const T & val ) { out<

struct Add {

int operator()(int & a, int & b) {

return a+b;

}

};

int main() {

int t[]={1,2,3,4,5,6,7,8,9,10};

vector v1(t, t+10);

vector v2(10);

transform(v1.begin(), v1.end(), v2.begin(), bind1st(Add(),1));

for_each(v2.rbegin(), v2.rend(), Out(cout));cout<

return 0;

}

Program outputs:

What happens when you attempt to compile and run the following code?

#include

#include

#include

#include

using namespace std;

int main() {

int t[] = {1,2,3,2,3,5,1,2,7,3,2,1,10, 4,4,5};

vector v1(t, t + 15);

set s1(t, t + 15);

pair::iterator, vector::iterator > resultSet = equal(s1.begin(), s1.end(), v1.begin());

cout<<*resultSet.first<<" "<<*resultSet.second<

return 0;

}

Program outputs:

What happens when you attempt to compile and run the following code? Choose all that apply.

#include

#include

#include

using namespace std;

class A

{

int a;

public:

A(int a) {this?>a = a; c++;}

A(const A & a) {this?>a = a.a; c++;}

~A() { c??;}

static int c;

};

int A::c(0);

int main ()

{

A* t[] = {new A(1), new A(2), new A(3),new A(4), new A(5)};

vectorv1(t, t+10);

dequed1(v1.begin(), v1.end());

d1.clear();

v1.clear();

cout<

return 0;

}

What happens when you attempt to compile and run the following code?

#include

#include

#include

#include

using namespace std;

class B { int val;

public:

B(int v):val(v){}

int getV() const {return val;} bool operator > (const B & v) const { return val>v.val;} };

ostream & operator <<(ostream & out, const B & v) { out<

templatestruct Out {

ostream & out; Out(ostream & o): out(o){}

void operator() (const T & val ) { out<

int main() {

int t[]={20, 30, 10, 20, 30, 10, 20, 30, 10, 20};

deque d1(t, t+10);

sort(d1.begin(), d1.end(), greater());

pair ::iterator, deque::iterator > result = equal_range(d1.begin(), d1.end(), B(20),

greater());

for_each(result.first, result.second, Out(cout));cout<

return 0;

}

Program outputs: