C++ Institute CPP : C++ Certified Professional Programmer

What happens when you attempt to compile and run the following code?
# include <deque>
# include <iostream>
# include <algorithm>
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<<v.getV(); return out;} template<class T>struct Out {
ostream & out; Out(ostream & o): out(o){}
void operator() (const T & val ) { out<<val<<" "; } };
int main() {
int t[]={20, 30, 10, 20, 30, 10, 20, 30, 10, 20};
deque<B> d1(t, t+10);
sort(d1.begin(), d1.end());
pair<deque<B> ::iterator, deque<B>::iterator > result = equal_range(d1.begin(), d1.end(),
B(20));
for_each(result.first, result.second, Out<B>(cout));cout<<endl;
return 0;
}
Program outputs:

• A. 20 20 20 20 30
• B. 10 10 10 20 20 20 20 30 30 30
• C. 20 20 20 20
• D. 10 20 20 20 20 30
• E. 10 20 20 20 20

What happens when you attempt to compile and run the following code?
# include <iostream>
# include <deque>
# include <list>
# include <queue>
# include <vector>
using namespace std;
int main()
{
int t[] ={ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
deque<int> mydeck(t, t+10);list<int> mylist(t,t+10);
queue<int> first;
queue<int> second(mydeck);
queue<int> third(second);
queue<int, list<int> > fourth(mylist);
mylist.clear();third.clear();
cout<<third.size()<< " "<<mydeck.size()<< endl;
cout<<fourth.size()<< " "<<mylist.size()<<endl;
return 0;
}

• A. program outputs: 0 0
  0 0
• B. program outputs: 10 10
  1 0 10
• C. program outputs: 10 0
  10 0
• D. program outputs: 10 0
  0 10
• E. compilation error

What happens when you attempt to compile and run the following code?
#include <iostream>
#include <algorithm>
#include <vector>
#include <set>
using namespace std;
void myfunction(int i) {
cout << " " << i;
}
int multiply (int a) {
return a*2;
}
int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
vector<int> v1(t, t+10);
set<int> s1(t, t+10);
transform(s1.begin(), s1.end(), v1.begin(), multiply);
transform(v1.begin(), v1.end(), s1.begin(), multiply);
for_each(s1.begin(), s1.end(), myfunction);
return 0;
}
Program outputs:

• A. 20 10 18 12 4 8 14 16 6 2
• B. 2 4 6 8 10 12 14 16 18 20
• C. 4 8 12 16 20 24 28 32 36 40
• D. compilation error

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:

• A. 10 5 9 6 2 4 7 8 3 1
• B. 1 2 3 4 5 6 7 8 9 10
• C. 10 9 8 7 6 5 4 3 2 1
• D. 1 5 9 6 2 4 7 8 3 1
• E. compilation error

What happens when you attempt to compile and run the following code?
#include <vector>
#include <iostream>
#include <algorithm>
#include <string>
using namespace std;
template<class T>struct Out {
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out<<val<<" "; } };
int main() {
string t[]={"aaa","Aaa", "aAa","aaA","bbb","Bbb", "bBb", "bbB"};
vector<string> v1(t, t+8);
sort(v1.begin(), v1.end());
for_each(v1.begin(), v1.end(), Out<string>(cout));cout<<endl;
return 0;
}
Program outputs:

• A. Aaa Bbb aAa aaA aaa bBb bbB bbb
• B. bBb bbB bbb Aaa aAa Bbb aaA aaa
• C. Aaa aAa Bbb aaA aaa bBb bbB bbb
• D. Aaa aAa bBb bbB bbb Bbb aaA aaa
• E. compilation error