Unable to run an example program.

Sylas

I am a beginner. I tried little numbers (between 1 and 6. I tried names. I tried telephone numbers. No success. Maybe a second file is missing. Can somebody help me. Thanks a lot. Here is tje file :
// example illustrating the use of std::list.

// This is not an example of good style, just an illustration of facilities

// pp 54-55, sec 3.7.3

// No guarantees offered. Constructive comments to bs@research.att.com

#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;

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");

}

? Offline

@Sylas Hi! What is t you're trying to accomplish with your code? What do you want to do?

Sylas

@Wieland Hi !
I am a beginner. I tried little numbers (between 1 and 6. I tried names. I tried telephone numbers. No success. Maybe a second file is missing. Can somebody help me. Thanks a lot. Here is tje file :
// example illustrating the use of std::list.

// This is not an example of good style, just an illustration of facilities

// pp 54-55, sec 3.7.3

// No guarantees offered. Constructive comments to bs@research.att.com

#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;

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");

}
That is what the console shows. What shal I do for running that ?? Many thanks.

KeithS

@Sylas said:

That is what the console shows. What shal I do for running that ??

What does the console show? What errors are you seeing?

btw, I can't see what this has to do with Qt?

Sylas

@KeithS Sorry . I made a mistake.
{one 1}
{two 2}
{three 3}
and so on (about 6 more lines) . I tried a copy-paste of my console without success.

KeithS

@Sylas

So what's the error? Is there any error?

Sylas

@KeithS Thanks. No there is no error at all; I suppose it's a Stroustrup product. But i dont know what to do for making it run.

jsulm

You could use debugger