dear maintainer:
the fallowing is a small sample of the code that contains all the info
to reproduce the problem.
the C library function isdigit() fails and causes segmention fault when
the input is is not numeric like xx.
COMPILE COMMAND : >> gcc -ansi --version -Wall -o ch2-13.out -lm
ch2-13.c
gcc (Debian 4.3.2-1.1) 4.3.2
Copyright (C) 2008 Free Software Foundation, Inc
/* USER NAME : vartan
* DATE STARTED : Wed Jul 01 19:28:34 2009
*
* COMPILE COMMAND : gcc -ansi --version -Wall -o ch2-13.out -lm ch2-13.c */
/* INCLUDE FILES */
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <ctype.h>
/* PREPROCESSOR CONSTANTS */
int main(void){ /* start of main */
int i = 1,
devisor, j = 0;
do {
printf("Please enter a valid numeric for devisor\n");
scanf("%d", &devisor);
}
while (isdigit(devisor));
printf ("counting\n");
while (i <= 100)
{
if (!( i++ % devisor))
{
printf("%4d",(i-1)); /* point to the correct line number that is devidable by devisor*/
printf(" *\n");
j++;
}
else
;
} /* end of while */
printf("\n The number of lines that is dividable by %d was %d.\n", devisor,j);
return(0);
} /* end of main */
