QUESTION: 85

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

#include <vector>
#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() {
B t[]={3,2,4,1,5,10,9,7,8,6};
vector<B> v1(t,t+10);
sort(v1.begin(), v1.end(), greater<B>());
cout<<*min_element(v1.begin(), v1.end());
return 0;
}

Program outputs:

3
1
6
10
compilation error

Answer(s): E

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QUESTION: 86

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

#include <iostream>
#include <string>
#include <sstream>
#include <iomanip>

using namespace std;

int main ()
{
string s;
getline(cin, s);
stringstream input(s);
stringstream output;

for( ; !input.fail() ; )
{
int i;
input>>hex>>i;
output<<setw(4)<<i;
}
cout<<output.str();
return 0;
}

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

64 100
100 256
100 256 256
0x64 0x100
0x100 0x256 0x256

Answer(s): C

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QUESTION: 87

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

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

int Add(int a, int b) {
return a+b;
}

int main() {
int t[]={1,2,3,4,5,6,7,8,9,10};
vector<int> v1(t, t+10);
vector<int> v2(10);
transform(v1.begin(), v1.end(), v2.begin(), bind2nd(ptr_fun (Add),1));
for_each(v2.rbegin(), v2.rend(), Out<int>(cout));cout<<endl;
return 0;
}

Program outputs:

1 2 3 4 5 6 7 8 9 10
2 3 4 5 6 7 8 9 10 11
10 9 8 7 6 5 4 3 2 1
11 10 9 8 7 6 5 4 3 2
compilation error

Answer(s): D

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QUESTION: 88

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

#include <vector>
#include <set>
#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<<" "; } };
struct Sequence {
int start;
Sequence(int start):start(start){}
int operator()() { return start++; } };

int main() {
vector<int> v1(10);
generate_n(v1.begin(), 10, Sequence(1));
random_shuffle(v1.rbegin(), v1.rend());
sort(v1.begin(), v1.end(), great<int>());
for_each(v1.begin(), v1.end(), Out<int>(cout));cout<<endl;
return 0;
}

Program outputs:

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

Answer(s): C

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