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[]={6,10,8,7,9};
vector<int> v1(10);
sort(t1, t1+5); sort(t2, t2+5);
copy(t1,t1+5,v1.begin());
copy(t2,t2+5,v1.begin()+5);
merge(v1.begin(), v1.begin()+5,v1.end());
for_each(v1.begin(), v1.end(), Out<int>(cout));cout<<endl;
return 0;
}
Program outputs:
What happens when you attempt to compile and run the following code?
# include <vector>
# include <iostream>
# include <algorithm>
# include <functional>
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);
cout<<*max_element(v1.begin(), v1.end(), greater<B>());
cout<<endl;
return 0;
}
Program outputs:
What happens when you attempt to compile and run the following code? Choose all possible answers.
#include <iostream>
using namespace std;
class C {
public:
int _c;
C():_c(0){}
C(int c) { _c = c;}
C operator+=(C & b) {
C tmp; tmp._c = _c+b._c;
return tmp;
} };
ostream & operator<<(ostream & c, const C & v) {
c<<v._c; return c; }
template <class T>
class A {
T _v;
public:
A() {}
A(T v): _v(v){}
T getV() { return _v; }
void add(T & a) { _v+=a; }
};
int main()
{
A<int> b(2);
A<C> a (5);
a.add(C());
cout << a.getV() <<endl;
return 0;
}
What happens when you attempt to compile and run the following code?
#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
int main () {
int t[] = {1,2,3,4,5,1,2,3,4,5};
vector<int> v (t,t+10);
vector<int>::iterator it;
int m1[] = {1, 2, 3};
it = search (v.begin(), v.end(), m1, m1+3);
cout << "found at position: " << it?v.begin() << endl;
return 0;
}
Program outputs:
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;} };
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 t1[]={3,2,4,1,5}; B t2[]={6,10,8,7,9}; vector<B> v1(5); transform(t1,t1+5,t2,v1.rbegin(), plus<B>()); for_each(v1.rbegin(), v1.rend(), Out<int>(cout));cout<<endl; return 0;
}
Program outputs:
