, and when I run it, I get the following message error:
I know the problem is that function should have been called with an object from Param, but I was expecting that the constructor Param(int , int) would do the job.
What is wrong with my assumption, and how could I fix this problem?
thank you in advance!!
santiagorf
Last edited by santiagorf; 06-26-2010 at 04:45 PM..
I know the problem is that function should have been called with an object from Param, but I was expecting that the constructor Param(int , int) would do the job.
It might be if you'd actually called it. You're just feeding it 2,3 not Param(2,3).
Thanks Corona688 for your prompt replay, and in fact if I call as
I will have the desired result. However, what I'm trying to generate is the behavior of the code below taken from "Teach yourself in 21 days".
Though the code is a little long there are few steps that are important (in black).
In the main function there is a call to a method SetFirstName from the class Employee
that pases as parameter a constant character string, but SetFirstName only requires a constant string reference.
This problem is solved by the String constructor
that takes a constant character string and makes a string.
So, in my code I was expecting to have the constructor
the same behavior as
, but there is something I don't see.
I don't see any similarity in design or inheritance between what you're trying to do and and the example you quote... I don't think the constructor is what lets it do that, are you sure that's the complete code? No external operator functions? Also: You can't cast one value into two values.
Last edited by Corona688; 06-27-2010 at 12:45 AM..
I don't see any similarity in design or inheritance between what you're trying to do and and the example you quote... I don't think the constructor is what lets it do that, are you sure that's the complete code? No external operator functions? Also: You can't cast one value into two values.
The code is taken from:
PHP Code:
http://newdata.box.sk/bx/c/htm/ch15.htm
see listing 15.1 and 15.2. Most of the code is exactly the same as the one I posted with the exception of the main function. According to the book -and I debugged it in order to verify it- this behavior is due to the constructor from String.
, and when I run it, I get the following message error:
I know the problem is that function should have been called with an object from Param, but I was expecting that the constructor Param(int , int) would do the job.
What is wrong with my assumption, and how could I fix this problem?
thank you in advance!!
santiagorf
This is known as implicit conversion and for constructors it works if it has a single argument only.
If you have multiple arguments and want to make use of the implicit conversion, then you need a constructor having default values.
How to initialize an object of class say "A", with an object of type say "B".
The following code give the error message "error: conversion from âAâ to non-scalar type âBâ requested"
#include <iostream>
using namespace std;
class B;
class A{
public:
A() { cout <<"\nA()" << endl; }
... (1 Reply)
I am learning about C++ and today am reading concepts for Constructor but it seems a bit difficult to grab it fully. Please anyone explain in simple words about Constructor? (1 Reply)
Hi,
If I run the following program
class A {
public:
A() { cout << "default" << endl; }
A(const A&) { cout << "copy" << endl; }
};
A tmp;
A fun() {
return tmp;
}
A test() {
A tmp;
cout << &tmp << endl;
return tmp;
} (1 Reply)
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I am new to programming shared objects and I was hoping someone could tell me if what I want to do is possible, or else lead me in the right direction.
I have a main program that contains an abstract base class. I also have a subclass that I'm compiling as a shared object. The subclass... (13 Replies)
I have a code as following:
#include <iostream>
#include <algorithm>
#include <list>
using namespace std;
//the class Nth is a predicates
class Nth{
private:
int nth;
int count;
public:
Nth(int n):nth(n),count(0){}
bool operator()(int){
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<?php
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Hi All,
I have made the simple following program :-
#include <string>
#include <iostream>
using namespace std;
class A{
private: int val;
public :
A(){cout<<"In A()"<<endl;}
A (const A& aa)
{
cout<<"In copy c'tor"<<endl;
}
};
A f(... (1 Reply)
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Regards,
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public class Greeter2Test
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public static... (4 Replies)