What happens when you attempt to compile and run the following code?
#include <deque>
#include <vector>
#include <iostream>
using namespace std;
int main ()
{
int t[] = {1, 2 ,3 ,4 ,5, 6 , 7, 8 , 9, 10};
vector<int>v1(t, t+10);
deque<int>d1(t, t+10);
vector<int>::iterator it1 = v1.begin();
deque<int>::iterator it2 = d1.begin();
d1.erase(it2+5);
it2 = d1.begin();
cout<<*(it2+5)<<" ";
v1.erase(it1+5);
it1 = v1.begin();
cout<<*(it1+5)<<endl;
}
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=0):val(v){}
int getV() const {return val;}
operator int () const { return 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<<" "; } };
struct Add {
B operator()(B & a, B & b) { return a+b; } };
int main() {
B t[]={1,2,3,4,5,6,7,8,9,10};
vector<B> v1(t, t+10);
vector<B> v2(10);
transform(v1.begin(), v1.end(), v2.begin(), bind2nd(Add(),1));
for_each(v2.rbegin(), v2.rend(), Out<B>(cout));cout<<endl;
return 0;
}
Program outputs:
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<<" "; } };
bool Greater(int v1, int v2) { return v1<v2; }
int main() {
int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};
vector<int> v1(t, t+10);
sort(v1.begin(), v1.end(), Greater);
for_each(v1.begin(), v1.end(), Out<int>(cout));cout<<endl;
return 0;
}
Program outputs:
What will happen when you attempt to compile and run the following code? Choose all that apply.
#include <iostream>
#include <algorithm>
#include <vector>
#include <set>
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; }
bool operator < (const A & b) const { return a<b.a;}
};
class F {
A val;
public:
F(A & v):val(v){}
bool operator() (A & v) {
if (v.getA() == val.getA()) return true;
return false;
}
};
int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
vector<A> v1(t, t + 10);
set<A> s1(t, t + 10);
A a(6); F f(a);
find_if(s1.begin(), s1.end(), f);
if (find_if(v1.begin(), v1.end(), f) !=v1.end()) {
cout<<"Found!\n";
} else {
cout<<"Not found!\n";
}
return 0;
}
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<<" ";
}
};
struct Sequence {
int start;
Sequence(int start):start(start){}
int operator()() { return start++; }
};
struct Odd { bool operator()(int v) { return v%2==0; }};
int main() {
vector<int> v1(10);
generate(v1.begin(), v1.end(), Sequence(1));
partition(v1.begin(),v1.end(), Odd());
for_each(v1.begin(), v1.end(), Out<int>(cout) );cout<<endl;
return 0;
}
Choose all possible outputs:
