C++ Certified Professional Programmer

228 Questions

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Question No. 1

"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 t1[]={3,2,4,1,5};

B t2[]={6,10,8,7,9};

vector<B> v1(10,0);

sort(t1, t1+5); sort(t2, t2+5); copy(t1,t1+5,v1.begin()); copy(t2,t2+5,v1.begin()+5); inplace_merge(v1.begin(), v1.begin()+5,v1.end());

for_each(v1.begin(), v1.end(), Out<B>(cout));cout<<endl; return 0;


Program outputs:

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