Use automatic conversions to assign new values

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

class myclass {
  int a;
public:
  myclass(int x) { 
     a = x; 
  } 
  myclass(char *str) { 
     a = atoi(str); 
  }
  int geta() { 
     return a; 
  }
};
 
int main()
{
  myclass object1 = 4;     // converts to myclass(4)
  myclass object2 = "123"; // converts to myclass("123");

  cout << "object1: " << object1.geta() << endl;
  cout << "object2: " << object2.geta() << endl;

  
  object1 = "1776";        // converts into object1 = myclass("1776");
  object2 = 2001;          // converts into object2 = myclass(2001);

  cout << "object1: " << object1.geta() << endl;
  cout << "object2: " << object2.geta() << endl;

  return 0;
}

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Use automatic conversions to assign new values : Constructor « Class « C++

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