Store a class object in a vector.



#include <iostream>
#include <vector>
using namespace std;

class Demo {
  double d;
public:
  Demo() { 
     d = 0.0; 
  }
  Demo(double x) { 
     d = x; 
  }

  Demo &operator=(double x) {
    d = x; return *this;
  }

  double getd() { 
    return d; 
  }
};

bool operator<(Demo a, Demo b)
{
  return a.getd() < b.getd();
}

bool operator==(Demo a, Demo b)
{
  return a.getd() == b.getd();
}

int main()
{
  vector<Demo> v;
  int i;

  for(i = 0; i <10; i++)
    v.push_back(Demo(i/3.0));

  for(i = 0; i <v.size(); i++)
    cout << v[ i ].getd() << " ";

  cout << endl;

  for(i = 0; i <v.size(); i++)
    v[ i ] = v[ i ].getd() * 2.1;

  for(i = 0; i <v.size(); i++)
    cout << v[ i ].getd() << " ";

  return 0;
}

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Store a class object in a vector. : Vector « Data Structure « C++

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