simple class

Newsgroup: comp.lang.c++

Subject: simple class

From: nvangogh <nvangogh@...>

Date: Fri, 09 May 2014 14:53:51 +0100



Hi,

I am reading c++ primer.



Exercise 7.4:

Write a class named person that represents the name and address of a

person. Use a string to hold each of these elements. Subsequent

exercises will incrementally add features to this class.



Exercise 7.5:

Provide operations in your person class to return the name and address.

Should these functions be const? Explain your choice.



So I have completed exercise 7.5 in this way:



// a class named person with operations



#include <string>



class Person

{

std::string name() const { return first_name;}

std::string addr() const { return address;}



// data members

std::string first_name;

std::string address;

};



Is this correct?

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Does C++ Primer offer non-trivial example programs? If not, please suggest a book that does.

Newsgroup: comp.lang.c++

Subject: Does C++ Primer offer non-trivial example programs? If not, please suggest a book that does.

From: Aditya Raj Bhatt <adityarajbhatt@...>

Date: Thu, 8 May 2014 05:09:21 -0700 (PDT)



I am seeing recommendations for C++ Primer everywhere (on the C++-faq lite, the stackoverflow list of C++ books) and other places. Now, I bought it and went through the index, but I was dismayed to find only C++ _features_ listed, and no sign of any non-trivial examples.



I have gone through Object Oriented Programming in _Turbo_ C++ by Robert Lafore. While severely outdated, it taught me many useful applications of the features in C++ (A card game, a horse simulation, fractals, a small adventure game) etc. I was wondering if C++ primer offers examples like this. I find it gets very dull if they just say something like, "you can pass a reference parameter using &. Eg.



void Examplefunction (int &x, int &y) {

x=5; y=6;

}



int main() {

int x,y; Examplefunction(x,y);

return 0;

}



"





Stuff like this is very boring to me, with no possible application. I mean, I am not a very creative person, and unless the application of a concept is shown to me explicitly through some useful example, I have a hard time remembering it. So can someone tell me if C++ Primer offers things like this (please mention what specific example it is). And if not, please recommend a book that is heavy on both explanation and big examples (at least, big from the point of a beginner).



Thank you and sorry for being overly verbose. This is my first post on this group.

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ostream Problem

Newsgroup: comp.lang.c++

Subject: ostream Problem

From: mrc2323@...

Date: Thu, 1 May 2014 13:46:07 -0700



I am trying to combine std::left and std::setw() as a single

function. The following code ignores the "left" manipulator. What am I

doing wrong? TIA



struct leftsetw // combined functions (left/width)

{

leftsetw(int w) : width(w) {}

int width;

};

ostream &operator<<(ostream &o, const leftsetw &a)

{

o.left, o.width(a.width);

return o;

}



ostringstream oss;

oss.str(""); oss << "Test " << leftsetw(12) << 42;



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Onslaught

Newsgroup: comp.lang.c++

Subject: Re: Onslaught

From: Chris Hinsley <chris.hinsley@...>

Date: Wed, 30 Apr 2014 14:33:39 +0100



On 2013-06-07 17:42:45 +0000, Chris Hinsley said:



Mmm, Has anyone even had a look ? I do have an improved version of the

engine that is mush more c++ if anyone is interested. But this code is

old enough not to drag into the future.



Regards



Chris

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=?ISO-8859-1?Q?=A73=2E5=2F6_in_the_C=2B=2B11_Standard?=

Newsgroup: comp.lang.c++

Subject: =?ISO-8859-1?Q?=A73=2E5=2F6_in_the_C=2B=2B11_Standard?=

From: Ayrosa <jabelloc@...>

Date: Tue, 29 Apr 2014 12:44:18 -0700 (PDT)



§3.5/6



The name of a function declared in block scope and the name of a variable declared by a block scope extern declaration have linkage. If there is a visible declaration of an entity with linkage having the same name and

type, ignoring entities declared outside the innermost enclosing namespace scope, the block scope declaration declares that same entity and receives the linkage of the previous declaration. If there is more than one such matching entity, the program is ill-formed. Otherwise, if no matching entity is found, the block scope entity receives external linkage.[ Example:



static void f();

static int i = 0; // #1

void g() {

extern void f(); // internal linkage

int i; // #2 i has no linkage

{

extern void f(); // internal linkage

extern int i; // #3 external linkage

}

}



There are three objects named i in this program. The object with internal linkage introduced by the declaration in global scope (line #1 ), the object with automatic storage duration and no linkage introduced by the declaration on line #2, and the object with static storage duration and external linkage introduced by the declaration on line #3. --end example ]



Consider the i object in line #3. Why does it have static storage duration and external linkage?

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Newsgroup: comp.lang.c++

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Newsgroup: comp.lang.c++

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