Package: gcc-4.1
Version: 4.1.1-21
Severity: normal
When I try to compile the following code, I need the fourth scanf("%i",&k); if
not, the expo variable equals 0.
This bug appears in gcc 4.0 and gcc 4.1 but not in gcc 3.3.
*** Code ***
/*#include <math.h>*/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int puissance(int N, int p, int e) /* p^e modulo N*/
{
int z, i;
z=1;
for (i=1;i<=e;i++)
{
z*=p;
z%=N;
}
return z;
}
int main(int argc, char *argv[])
{
srand (time (NULL));
int base,pi,expo,k,pie;
char message;
int premier, deuxieme; /*Premier et deuxième nombres transmis*/
printf("Entrer la base ");
scanf("%d",&base);
printf("Entrer la perturbation ");
scanf("%d",&pi);
printf("Entrer l’exposant ");
scanf("%d",&expo);
/* scanf("%i",&k);*/ /* This scanf is mandatory in gcc 4, if not expo is 0,
even if you force it to be 11 */
/* expo=11;*/ /* Commented like this, expo == 0 in gcc 4 but not in gcc 3 */
while(1)
{
printf("Entrer la lettre à coder ");
scanf("%s",&message);
k=1+(rand() % (base-1));
premier=puissance(base,pi,k);
printf("%i\n",expo);
pie=puissance(base,pi,expo);
printf("pi^e=%i\n",pie);
deuxieme=((message-96) * puissance(base,pie,k)) % base;
printf("Le code est (%i,%i).\n",premier,deuxieme);
}
return 0;
}
*** End of code ***
-- System Information:
Debian Release: lenny/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.16-2-686-smp (SMP w/1 CPU core)
Locale: [EMAIL PROTECTED], [EMAIL PROTECTED] (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages gcc-4.1 depends on:
ii binutils 2.17-3 The GNU assembler, linker and bina
ii cpp-4.1 4.1.1-21 The GNU C preprocessor
ii gcc-4.1-base 4.1.1-21 The GNU Compiler Collection (base
ii libc6 2.3.6.ds1-13 GNU C Library: Shared libraries
ii libgcc1 1:4.1.1-21 GCC support library
ii libssp0 4.1.1-21 GCC stack smashing protection libr
Versions of packages gcc-4.1 recommends:
ii libc6-dev 2.3.6.ds1-13 GNU C Library: Development Librari
ii libmudflap0-dev 4.1.1-21 GCC mudflap support libraries (dev
-- no debconf information
