linuxthing$g++ -v
Reading specs from /usr/lib/gcc/x86_64-redhat-linux/3.4.6/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --enable-shared --enable-threads=posix
--disable-checking --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-java-awt=gtk --host=x86_64-redhat-linux
Thread model: posix
gcc version 3.4.6 20060404 (Red Hat 3.4.6-3)
more main.c
#include <iostream>
using namespace std;
int main() {
cout
<< "Input in hex two integers x and y." << endl;
int x, y; cin >> hex >> x >> y;
}
linuxthing$more makefile
run: prog
./prog
prog: main.o
g++ -o prog main.o
# gcc -o prog main.o -lm
# -lm option to ensure sqrt gets included from math lib
main.o: main.c
g++ -c -Wall main.c
# gcc -c -ansi -pedantic -Wall main.c
# gcc -c -Wall main.c
clean:
rm -f main.o
rm -f prog
linuxthing$make run
./prog
Input in hex two integers x and y.
aaaaaaaa
linuxthing$
-----------------
This shows the failure to allow input.
Below follows the intended behaviour as given by an earlier version of g++
-----------------
yang$g++ -v
Reading specs from
/package/gcc-2.95.2/lib/gcc-lib/sparc-sun-solaris2.8/2.95.2/specs
gcc version 2.95.2 19991024 (release)
yang$more main.c
#include <iostream>
using namespace std;
int main() {
cout
<< "Input in hex two integers x and y." << endl;
int x, y; cin >> hex >> x >> y;
}
yang$
run: prog
./prog
prog: main.o
g++ -o prog main.o
# gcc -o prog main.o -lm
# -lm option to ensure sqrt gets included from math lib
main.o: main.c
g++ -c -Wall main.c
# gcc -c -ansi -pedantic -Wall main.c
# gcc -c -Wall main.c
clean:
rm -f main.o
rm -f prog
yang$make run
g++ -c -Wall main.c
g++ -o prog main.o
./prog
Input in hex two integers x and y.
aaaaaaaa
bbbbbbbb
yang$
--
Summary: cin fails to allow input to be entered
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: vanemden at cs dot uvic dot ca
GCC build triplet: gcc version 3.4.6 20060404 (Red Hat 3.4.6-3)
GCC host triplet: linux.cs.uvic.ca
GCC target triplet: linux.cs.uvic.ca
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33000
