Re: Entries impossible in a Stoustrup code example

Le mardi 24 mai 2016 08:24:44 UTC+2, aubertin.sylvain a écrit :
> The mame of this code is "list". It seems to be incomplete (nowhere a cin instruction). It runs but it doesn't work. May any one help me (I am a beginner).
> Here is the code:
>
> /*phone_book.cpp*/
>
> #include<list>
> #include<iostream>
> #include<string>
> using namespace std;
>
> struct Entry {
> string name;
> int number;
> Entry(const string& n, int i) :name(n), number(i) { }
> };
>
> list<Entry> phone_book;
>
> void print_entries()
> /*
> this kind of function should use a parameter,
> rather then a global name
> */
> {
> typedef list<Entry>::const_iterator LI;
>
> for (LI i = phone_book.begin(); i != phone_book.end(); ++i) {
> const Entry& e = *i; // reference used as shorthand
> cout << '{' << e.name << ' ' << e.number << "}\n";
> }
> }
>
> void print_entry(const string& s)
> /*
> Is this the right treatment of a string not found?
> */
> {
> typedef list<Entry>::const_iterator LI;
> // 13/
> for (LI i = phone_book.begin(); i != phone_book.end(); ++i) {
> const Entry& e = *i; // reference used as shorthand
> if (s == e.name) {
> cout << e.name << ' ' << e.number << '\n';
> return;
> }
> }
> }
>
> void f(const Entry& e, list<Entry>::iterator i, list<Entry>::iterator p)
> /*
> just some nonsense code
> */
> {
> phone_book.push_front(e); // add at beginning
> phone_book.push_back(e); // add at end
> phone_book.insert(i,e); // add before the element referred to by `i'
>
> phone_book.erase(p); // remove the element referred to by `p'
> }
>
> int main()
> {
>
> phone_book.push_back(Entry("one",1));
> phone_book.push_back(Entry("two",2));
> phone_book.push_back(Entry("three",3));
> phone_book.push_back(Entry("four",4));
> phone_book.push_back(Entry("five",5));
> Entry six("six",6);
> print_entries();
> f(six,phone_book.begin(),phone_book.begin());
> print_entries();
> print_entry("four");
> print_entry("seven");
> print_entry("three");
> }
> Thanks again

Hi Dominique. I tried to do something with the result of the object file, without any success. I should like to have your opinion: is it possible with a new function (2 cin inside) to make this program complete ??
I tried many times, but the compiler returns me a lot of errors. Thanks again.

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