Hi Eric,
That's not a question regarding gcc ...
is there any reason why you rewrite the examples by hand before you mail
them? In this example, there are at least 3 typing mistakes -- I'm sure
that g++ did NOT compile this code:
> cout << "Enter some strings: "
a ";" is missing
> s2,begin(), s2.end(),
this has to be "s2.begin" instead of "s2,begin"
> printContainer(setinter);
the variable is named "setInter".
In Addition, I think the output you presented in your example is
generated by a different program:
> eric@eric-laptop:~/cppcookbook/ch7$ ./a.out
> Enter a series of strings: a b c d
> {a, b, c, d}
The beginning of the example you mailed us is:
> int main() {
>
> cout << "Enter some strings: "
so EITHER the compiler by miracle prints "Enter a series of strings:"
when you ask it to print "Enter some strings: "
OR you mailed us the wrong code!!!
Beside that, the code seems fine to my (except that it is missing all
error-checking).
On Ubuntu, <Control-D> should be correct to finish the string-reading
Axel
On Tue, Jul 12, 2011 at 10:27:27PM -0700, eric wrote:
> Dear advanced c/g++ programers:
>
> A program request me to enter twice input
> that program probably is tested good on visual c++ 7.1 on window xp,
> but my system is g++ on linux(Ubuntu10.04)
> It assume
> Enter some strings: a b c d
> ^Z
> Enter some more strings: d e f g
> ^Z
> Union: a b c d e f g
> Difference: a b c
> Intersection: d
> all these you can get from page 273 and 274 of book(c++ cookbook)
>
> but my test result is
> -------------------------------
> eric@eric-laptop:~/cppcookbook/ch7$ ./a.out
> Enter a series of strings: a b c d
> ^Z
> [7]+ Stopped ./a.out
> eric@eric-laptop:~/cppcookbook/ch7$ ./a.out
> Enter a series of strings: a b c d
> {a, b, c, d}
> Segmentation fault
> -------------------------------------------------------------------
> second case , I used <Enter><Control-D>
> first case, I used <Enter><Control-Z>
>
> the following in the program I tested, you still can download from
> http://examples.oreilly.com/9780596007614/
> ------------------------------------------------------------------------------------------------
> // Example 7-8. Unsing set operations
> #include <iostream>
> #include <algorithm>
> #include <string>
> #include <set>
> #include <iterator>
> #include "utils.h" // For parintContainer(): see 7.10
>
> using namespace std;
>
> int main() {
>
> cout << "Enter some strings: "
> istream_iterator<string> start(cin);
> istream_iterator<string> end;
> set<string> s1(start, end);
>
> cin.clear();
>
> cout << "Enter some more strings: ";
> set<string> s2(++start, end);
>
> set<string> setUnion;
> set<string> setInter;
> set<string> setDiff;
>
> set_union(s1.begin(), s1.end(),
> s2,begin(), s2.end(),
> inserter(setUnion, setUnion.begin()));
>
> set_difference(s1.begin(), s1.end(),
> s2.begin(), s2.end(),
> inserter(setDiff, setDiff.begin()));
>
> cout << "Union:\n";
> printContainer(setUnion);
> cout << "Difference:\n";
> printContainer(setDiff);
> cout << "Intersection:\n";
> printContainer(setinter);
> }
> --------------------------------------------------------------------------------------------------
> utils.h
> -------------------------------
> // Example 7-12. Writing your own printing function
> #include <iostream>
> #include <string>
> #include <algorithm>
> #include <iterator>
> #include <vector>
>
> using namespace std;
>
> template<typename C>
> void printContainer(const C& c, char delim = ',', ostream& out = cout)
> {
> printRange(c.begin(), c.end(), delim, out);
> }
>
> template<typename Fwd>
> void printRange(Fwd first, Fwd last, char delim = ',', ostream& out =
> cout) {
> out << "{";
> while (first != last) {
> out << *first;
> if (++first != last)
> out << delim << ' ';
> }
> out << "}" << endl;
> }
> ------------------------------------------------------------------------------------------------------------------
> Ned and thanks your help a lot in advance
> Eric
