Brian Budge wrote:
Hi Morten -
I can't say that I've heard of Integer.h before, and moreover none of my linux systems have that header file.
Is it from a special library, perhaps akin to gnu multiple precision?
Brian
On Tue, 22 Feb 2005 10:13:17 +0100, Morten.Gulbrandsen
<f1000mhz@xxxxxxxx> wrote:
Please help,
how can I compile this ?
g++ -v Reading specs from /opt/sfw/gcc-3/lib/gcc-lib/i386-pc-solaris2.9/3.3.2/specs Configured with: ../gcc-3.3.2/configure --prefix=/opt/sfw/gcc-3 --with-ld=/usr/ccs/bin/ld --with-as=/usr/ccs/bin/as --without-gnu-ld --without-gnu-as --enable-shared Thread model: posix gcc version 3.3.2
#include <assert.h> #include <iostream>
#include <Integer.h> // valid for GNU g++
using namespace std;
int main() { int i; int n; Integer product = 1; // unsigned long long int product = 1;
cout << "The factorial of n will be computed.\n" "\n" "Input n: ";
cin >> n;
assert(cin && n >= 0);
for (i = 2; i <= n; ++i) product *= i;
cout << "\n" "factorial(" << n << ") = " << product << "\n" "\n"; }
/*
bash-2.05$ g++ -ansi -pedantic -Wall -o main.out main.c -L /opt/sfw/gcc-3/lib/ -R /opt/sfw/gcc-3/lib/ -lstdc++ main.c:5:53: Integer.h: No such file or directory main.c: In function `int main()': main.c:13: error: `Integer' undeclared (first use this function) main.c:13: error: (Each undeclared identifier is reported only once for each function it appears in.) main.c:13: error: parse error before `=' token main.c:22: error: `product' undeclared (first use this function)
*/
best regards
Morten Gulbrandsen
===
Hi Brian, thank you,
I found it in some interesting code,
it should be possible to compute factorial 100 with it.
here I found more:
http://www.frenchfries.net/paul/factoring/source.html#gmplib
http://www.frenchfries.net/paul/src/Integer.h
http://www.frenchfries.net/paul/src/Integer.cc
Integer.h <http://www.frenchfries.net/paul/src/Integer.h>, and Integer.cc <http://www.frenchfries.net/paul/src/Integer.cc>
This is a C++ Integer class that I threw together to make the gmp library work like normal arithmetic. It lets you play with big integers just like you would with |(int)| or |(long int)|. There is also a .tar.gz <http://www.frenchfries.net/paul/src/Integer_class.tar.gz> version available that includes small Makefile and demo test code.
Requires the GMP library <http://www.frenchfries.net/paul/factoring/source.html#gmplib> from GNU.
The page looks nice and I would like to try it out.
The idea is to be able to make some ADT Integer with arbitrary precicion.
factorial 100 - 10000 would be fine.
I first read about Integer.h in conjunction with gcc from here :
http://www.cse.ucsc.edu/~pohl/abc4.html
The sources extracts to
bash-2.05$ cat READ_ME --- The GNU C++ compiler, g++, provides the header file
Integer.h
for working with big integers. The latest versions of the compiler requires that the library
libg++.a
be made available to it. We provide access via the makefile.
bash-2.05$ cat makefile
CC = g++
CFLAGS = -Wall
EXEC = a.out
INCLS = LIBS = -lg++ ## for the Integer type in Integer.h
OBJS = main.o
$(EXEC): $(OBJS)
@echo "linking ..."
@$(CC) $(CFLAGS) -o $(EXEC) $(OBJS) $(LIBS)$(OBJS):
$(CC) $(CFLAGS) $(INCLS) -c $*.crelink:
@echo "relinking ..."
@$(CC) $(CFLAGS) -o $(EXEC) $(OBJS) $(LIBS)
bash-2.05$ cat main.c #include <assert.h> #include <iostream.h> #include <Integer.h> // valid for GNU g++
int main()
{
int i;
int n;
Integer product = 1; cout << "The factorial of n will be computed.\n"
"\n"
"Input n: ";
cin >> n;
assert(cin && n >= 0);
for (i = 2; i <= n; ++i)
product *= i;
cout << "\n"
"factorial(" << n << ") = " << product << "\n"
"\n";
}
bash-2.05$
I don't think I did something wrong, but I must have missed something, anyway I have two different version available.
bash-2.05$ /opt/sfw/bin/gcc -v Reading specs from /opt/sfw/lib/gcc-lib/i386-pc-solaris2.9/2.95.3/specs gcc version 2.95.3 20010315 (release)
bash-2.05$ which g++
/opt/sfw/gcc-3/bin/g++
bash-2.05$ g++ -v
Reading specs from /opt/sfw/gcc-3/lib/gcc-lib/i386-pc-solaris2.9/3.3.2/specs
Configured with: ../gcc-3.3.2/configure --prefix=/opt/sfw/gcc-3 --with-ld=/usr/ccs/bin/ld --with-as=/usr/ccs/bin/as --without-gnu-ld --without-gnu-as --enable-shared
Thread model: posix
gcc version 3.3.2
Please help
Best regards
Morten Gulbrandsen
