QUESTION: 9

Which sentence is correct about the code below?

#include <iostream>
#include <algorithm>
#include <vector>
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; }
/* Insert Code Here */
};

struct add10 { void operator()(A & a) { a.setA(a.getA() + 10); } };

int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
vector<A> v1(t, t + 10);
for_each(v1.begin(), v1.end(), add10());
vector<A>::iterator it = find(v1.begin(), v1.end(), A(7));
cout << it?>getA() << endl;
return 0;
}

it will compile and print 7
it will not compile
it will compile but the program result is unpredictable
adding code:
bool operator !=(const A & b) const {
if (this?>a != b.a) { return true; } return false; }
at Place 1 will allow the program to compile

Answer(s): B

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QUESTION: 10

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

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;

void myfunction(int i) {
cout << " " << i;
}
void multiply (int a) {
a*2;
}

int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
vector<int> v1(t, t+10);
for_each(v1.begin(), v1.end(), multiply);
iter_swap(v1.begin(),t+9);
for_each(v1.begin(), v1.end(), myfunction);
return 0;
}

Program outputs:

1 5 9 6 2 4 7 8 3 1
compilation error
1 2 3 4 5 6 7 8 9 10
10 9 8 7 6 5 4 3 2 1
10 5 9 6 2 4 7 8 3 1

Answer(s): A

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QUESTION: 11

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

#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
template<class T>struct Out {
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out<<val<<" "; } };

int main() {
int t[]={3,2,4,1,5,10,9,7,8,6};
vector<int> v1(t,t+10);
cout<<*max_element(v1.begin(), v1.end());
return 0;
}

Program outputs:

3
1
6
10
compilation error

Answer(s): D

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QUESTION: 12

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

#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
template<class T>struct Out {
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out<<val<<" "; } };

int main() {
int t1[]={3,2,4,1,5};
int t2[]={5,6,8,2,1};
vector<int> v1(10);
sort(t1, t1+5);
sort(t2, t2+5);
set_intersection(t1,t1+5,t2,t2+5,v1.begin());
for_each(v1.begin(), v1.end(), Out<int>(cout));cout<<endl;
return 0;
}

Program outputs:

compilation error
1 2 3 4 5 6 8 0 0 0
1 2 3 4 5 6 8 2 1 0
1 1 2 2 3 4 5 5 6 8
1 2 5 0 0 0 0 0 0 0

Answer(s): E

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