Helping Hand Questions for CPP

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<<val<<" ";

}

};

struct Sequence {

int start;

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

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

int main() {

vector v1(10);

vector v2(10);

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

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

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

return 0;

}

Program outputs:

What will be output of the program when you attempt to compile and run the following code?

#include

#include

#include

#include

using namespace std;

int main(){

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

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

multimap m;

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

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

}

m[0]="ten";

m.insert(pair(1,"eleven"));

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

cout<<i?>second<<" ";

}

return 0;

}

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

#include

#include

using namespace std;

class A

{

int a,b;

public:

A(const A & c) { a = c.a; }

A():a(0),b(0){}

void setA(int a) {this?>a = a;} void setB(int b) {this?>b = b;}

int getA() {return a;} int getB() {return b;}

};

int main ()

{

vectorv;

A a;

a.setA(10); a.setB(11);

v.push_back(a);

cout<<v[0].getB()<<" "<<v[0].getA()<<endl;

return 0;

}