CPP C++ Certified Professional Programmer Questions and Answers

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

#include

#include

#include

using namespace std;

void myfunction(int i) {

cout << " " << i;

}

int main() {

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

vector v1(t, t + 10);

copy(t, t+10, v1.end());

for_each(v1.begin(), v1.end(), myfunction);

return 0;

}

Program outputs:

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

#include

#include

#include

#include

using namespace std;

templatestruct Out {

ostream & out;

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

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

bool Greater(int v1, int v2) { return v1

int main() {

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

vector v1(t, t+10);

sort(v1.begin(), v1.end(), Greater);

for_each(v1.begin(), v1.end(), Out(cout));cout<

return 0;

}

Program outputs:

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

#include

#include

#include

using namespace std;

class A

{

int a;

public:

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

~A() { c??;}

static int c;

};

int A::c(0);

int main ()

{

A t[] = {0, 1, 2, 3, 4, 5, 6, 7, 8 , 9};

vectorv1(t, t+10);

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

deque d2;

d2 = d1;

cout<

return 0;

}

How many objects of type A will be created:

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

#include

using namespace std;

template

class A {

T_v;

public:

A() {}

A(T v): _v(v){}

friend ostream & operator<<(ostream & c, const A & v) {

c<

}

};

int main()

{

Aa(10);

cout<

return 0;

}

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 Sequence {

int start;

Sequence(int start):start(start){}

int operator()() { return start++; }

};

struct Odd { bool operator()(int v) { return v%2==0; }};

int main() {

vector v1(10);

generate(v1.begin(), v1.end(), Sequence(1));

partition(v1.begin(),v1.end(), Odd());

for_each(v1.begin(), v1.end(), Out(cout) );cout<

return 0;

}

Choose all possible outputs:

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

#include

#include

using namespace std;

int main() {

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

string s[] = { "one", "one", "two", "two", "three","three", "four", "four", "five", "five"};

map m;

for (int i = 0; i < 10; i++) {

m.insert(pair(t[i], s[i]));

}

if (m.count(3) == 2) {

m.erase(3);

}

for (map::iterator i = m.begin(); i != m.end(); i++) {

cout << i?>first << " ";

}

return 0;

}

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

#include

#include

#include

using namespace std;

int main(){

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

string first[] = {"three", "four", "two", "one", "six","five", "seven", "nine","eight"," ten"};

map m;

for(int i=0; i<10; i++) {

m.insert(pair(second[i],first[i]));

}

if (m[11] == "eleven") {

cout<<"eleven ";

}

for(map::iterator i=m.begin();i!= m.end(); i++) {

cout<second<<" ";

}

cout<

return 0;

}

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

#include

#include

#include

#include

using namespace std;

class A {

int a;

public:

A(int a) : a(a) {}

int getA() const { return a; } void setA(int a) { this?>a = a; }

bool operator < (const A & b) const { return a

};

class F {

A val;

public:

F(A & v):val(v){}

bool operator() (A & v) {

if (v.getA() == val.getA()) return true;

return false;

}

};

int main() {

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

vector v1(t, t + 10);

set s1(t, t + 10);

A a(6); F f(a);

find_if(s1.begin(), s1.end(), f);

if (find_if(v1.begin(), v1.end(), f) !=v1.end()) {

cout<<"Found!\n";

} else {

cout<<"Not found!\n";

}

return 0;

}

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<

int main() {

int t1[]={3,2,4,1,5};

int t2[]={5,6,8,2,1};

vector v1(10);

sort(t1, t1+5);

sort(t2, t2+5);

set_symmetric_difference(t1,t1+5,t2,t2+5,v1.begin());

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

void myfunction(int i) {

cout << " " << i;

}

int main() {

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

set s1(t, t+10);

vector v1(s1.rbegin(), s1.rend());

swap(s1, v1);

for_each(v1.begin(), v1.end(), myfunction);

for_each(s1.begin(), s1.end(), myfunction);

return 0;

}

Program outputs:

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

#include

#include

int main ()

{

std::vectorv1;

for(int i = 0; i<10; i++) {v1.push_back(i); }

std::vector v2(v1.begin()+2, v1.end()?2);

std::vector::iterator it = v2.begin();

for( ; it != v2.end(); it++) {std::cout<<*it++<<" "; }std::cout<

return 0;

}

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

#include

#include

#include

#include

using namespace std;

templatestruct Out {

ostream & out;

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

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

int main() {

string t[]={"aaa","Aaa", "aAa","aaA","bbb","Bbb", "bBb", "bbB"};

vector v1(t, t+8);

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

for_each(v1.begin(), v1.end(), Out(cout));cout<

return 0;

}

Program outputs:

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

#include

#include

class A {

public:

virtual int f() { return 10; }

virtual ~A(){}

};

class B: public A {

int f() {return 11; }

virtual ~B(){}

};

int main (){

std::vectorv1;

for(int i = 10; i>0; i??)

{

i%2>0?v1.push_back(new A()):v1.push_back(new B());

}

std::vector::iterator it = v1.begin();

while(it != v1.end())

{

std::cout<f()<<" ";

v1.pop_back();++it;

}

return 0;

}

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

#include

#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(ptr_fun (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

using namespace std;

int main(){

int myints[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };

vectorv(myints, myints+10);

set s1(v.begin(),v.end());

set > s2(v.begin(), v.end());

for(set::iterator i=s1.begin();i!= s1.end(); i++) {

cout<<*i<<" ";

}

for(set >::iterator i=s2.begin();i!= s2.end(); i++) {

cout<<*i<<" ";

}

cout<

return 0;

}

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

#include

#include

using namespace std;

int main() {

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

string s[] = { "one", "one", "two", "two", "three","three", "four", "four", "five", "five"};

multimap m;

for (int i = 0; i < 10; i++) {

m.insert(pair(t[i], s[i]));

}

if (m.count(3) == 2) {

m.erase(3);

}

for (multimap::iterator i = m.begin(); i != m.end(); i++) {

cout << i?>first << " ";

}

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() {

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

vector v1(t,t+10);

cout<<*max_element(v1.begin(), v1.end(), greater());

cout<

return 0;

}

Program outputs: