C++ Institute CPP C++ Certified Professional Programmer Exam Practice Test

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

#include

#include

using namespace std;

template

class A {

T_v;

public:

A() {}

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

T getV() { return _v; }

void add(T & a) { _v+=a; }

void add(string & a) {

_v.insert(0, a);

}

};

int main()

{

Aa("Hello");

string s(" world!");

a.add(s);

cout << a.getV() <

return 0;

}

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

#include

#include

#include

#include

#include

using namespace std;

class compare {

bool reverse;

public:

compare(bool revparam = false){ reverse = revparam;}

bool operator()(int lhs, int rhs) const{

if (reverse)return (lhs > rhs);

elsereturn (lhs < rhs);

}

};

int main(){

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

priority_queue > first(myints, myints + 10);

priority_queue, compare> second(myints, myints + 10,

compare(false));

while (first.size() > 0){

cout << first.top() << " "; first.pop();

}

while (second.size() > 0) {

cout << second.top() << " ";second.pop();

}

return 0;

}

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

#include

#include

#include

#include

#include

using namespace std;

int main()

{

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

deque mydeck(t, t+10);list mylist(t,t+10);

queue first;

queue second(mydeck);

queue third(second);

queue > fourth(mylist);

mylist.clear();third.clear();

cout<

cout<

return 0;

}

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

#include

#include

int main ()

{

std::vectorv1;

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

{

v1.push_back(i);

}

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

int sum = 0;

while(it != v1.end())

{

sum+=it++;

}

std::cout<<*v1.erase(v1.begin(),v1.end()?3)<<" "<

return 0;

}

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

#include

#include

#include

using namespace std;

int main () {

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

vector v (t,t+10);

vector::iterator it;

int m1[] = {1, 2, 3};

it = search (v.begin(), v.end(), m1, m1+3);

cout << "found at position: " << it?v.begin() << endl;

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

listv(t, t+10);

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

if (s1.count(3) == 2) {

s1.erase(3);

}

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

cout<<*i<<" ";

}

return 0;

}

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

#include

#include

#include

using namespace std;

void print(int v) {

cout<

}

struct Sequence {

int start;

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

int operator()() {

return start++;

}

};

int main() {

vector v1(10);

generate_n(v1.begin(), 10, Sequence(1));

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

cout<

return 0;

}

Program outputs:

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

#include

#include

using namespace std;

int main ()

{

vectorv1(10, 3);

v1.push_back(3);

cout<

return 0;

}

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

using namespace std;

int main ()

{

float f1 = 10.0;

float f2 = 10.123;

cout<

return 0;

}

Program outputs:

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

#include

using namespace std;

class C {

public:

int _c;

C():_c(0){}

C(int c) { _c = c;}

C operator+=(C & b) {

C tmp; tmp._c = _c+b._c;

return tmp;

} };

ostream & operator<<(ostream & c, const C & v) {

c<

template

class A {

T_v;

public:

A() {}

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

T getV() { return _v; }

void add(T & a) { _v+=a; }

};

int main()

{

A b(2);

Aa (5);

a.add(C());

cout << a.getV() <

return 0;

}

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

#include

#include

using namespace std;

int main ()

{

float f = 10.126;

cout.unsetf(ios::floatfield);

cout<

return 0;

}

What will be a mantissa part of the numbers displayed:

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

using namespace std;

int main()

{

cout.setf(ios::oct, ios::basefield);

cout<<100<<" ";

cout.setf(ios::showbase);

cout<<100<<" ";

return 0;

}

Program outputs:

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_backward(t, t+10, v1.rend());

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

using namespace std;

bool mycomparison (int first, int second){return first>second;}

template

void print(T start, T end) {

while (start != end) {

std::cout << *start << " "; start++;

}

}

int main()

{

int t1[] ={ 1, 7, 8, 4, 5 };

list l1(t1, t1 + 5);

int t2[] ={ 3, 2, 6, 9, 0 };

list l2(t2, t2 + 5);

l1.sort(mycomparison);

l2.sort(mycomparison);

l1.merge(l2,mycomparison);

print(l1.begin(), l1.end());

print(l2.begin(), l2.end()); 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=0):val(v){}

int getV() const {return val;}

B operator +(const B &b )const { return B(val + b.val);} };

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

templatestruct Out {

ostream & out;

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

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

template

struct Add : public binary_function {

A operator() (const A & a, const A & b) const { return a+b; } };

int main() {

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

deque d1(t, t+10);

deque d2(10);

transform(d1.begin(), d1.end(), d2.begin(), bind2nd(Add(), 1));

for_each(d2.rbegin(), d2.rend(), Out(cout));cout<

return 0;

}

Program outputs: