CPP Practice Questions

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

#include

#include

#include

using namespace std;

int main () {

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

vector v (t,t+10);

vector::iterator it;

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

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

if (it != v.end())

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

return 0;

}

What will happen when you attempt to compile and run the code below, assuming that you enter the following sequence: true false?

#include

#include

using namespace std;

int main ()

{

bool a,b;

cin>>boolalpha>>a>>b;

cout<

return 0;

}

Program will output:

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

#include

#include

int main ()

{

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

std::vectorv1(t,t+5);

std::vectorv2(v1);

v1.resize(10);

v2.reserve(10);

std::vector::iterator i = v1.begin();int ii = 0;

while (i != v1.end()) { std::cout<

i = v2.begin();ii=0;

while (i != v2.end()) { std::cout<

return 0;

}

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

#include

#include

#include

using namespace std;

int main ()

{

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

vector v1(t, t + 10);

deque d1(v1.begin(), v1.end());

deque d2;

d2 = d1;

d2.insert(d1.rbegin(), 10);

for(int i = 0; i

{

cout<

}

return 0;

}

What will happen when you attempt to compile and run the code below, assuming that you enter the following sequence: 64 100?

#include

#include

#include

#include

using namespace std;

int main ()

{

string s;

getline(cin, s);

stringstream input(s);

stringstream output;

for( ; !input.fail() ; )

{

int i;

input>>hex>>i;

output<

}

cout<

return 0;

}

What will be the result assuming that user will enter following sequence: 64 100:

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

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

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

deque d1(t, t+10);

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

deque::iterator it = upper_bound(d1.begin(), d1.end(), B(4), greater());

for_each(it, d1.end(), Out(cout)); cout<

return 0;

}

Program outputs: