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Pavanagg
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Asked: 2022-04-25T19:39:14+05:30 In:

Write a templated class named “EveryOther” that behaves much like …

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Write a templated class named “EveryOther” that behaves much like std::vector (in the file named “everyother.h”). It has a member function called “push_back”, but only every other call to the member function actually does anything (actually pushed the element to the end of the structure). The class should have a default constructor and a constructor that takes an initializer list (be sure that you only add every other element). The other function that EveryOther needs to support is the operator<<, see the test cases for formating.

This class is templated so that instances like EveryOther<char> and EveryOther<vector<int>> are supported.

Input for testing the constructor:

#include<string>
EveryOther<char> eo_1;
EveryOther<std::string> eo_2 {“include”,”don’t”,”keep”,”leave”};

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    1. ADMIN 2
      This answer was edited.

      filename: everyother.h

      #pragma once
#include <iostream>
#include <vector>
#include <sstream>
#include <initializer_list>
using std::initializer_list;
using std::vector;
using std::ostream;
using std::cout;
template<typename T>
class EveryOther;

template<typename T>
ostream & operator<<(ostream & o, const EveryOther<T>& e);

template <class T>
class EveryOther{
public:
vector<T>vec_;
EveryOther()=default;
EveryOther(initializer_list<T> c): vec_(c){};
void push_back(T var){
vec_.push_back(var);
}

int size(){
vector<T>vec1;
for(size_t i = 0; i < vec_.size(); i+=2){
vec1.push_back(vec_[i]);
}
return vec1.size();
}
friend ostream & operator<< <T>(ostream &, const EveryOther&);

};
template<typename T>
ostream & operator<<(ostream & o,const EveryOther<T>& e){
o << "EveryOther(";
for(size_t i = 0; i < e.vec_.size(); i+=2){
o << e.vec_[i] << ", ";
}
o << ')';
return o;
}

      filename: main.cpp

      #include <iostream>
#include "everyother.h"
int main() 
{
EveryOther<char> eo_1;
EveryOther<std::string> eo_2 {"include", "dont", "keep", "leave"};

std::cout << eo_2 << std::endl;
}

      Output EveryOther(include, keep, )

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