Thread: floating point exception

Code:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>

int main(int argc, char *argv[]){
    char *line;
    int number_words, number_space, size_line;
    int space_per_word, upoloipo, i, j;
    
    size_line = atoi (argv[1]);
    
    line = (char*) malloc(sizeof(char)*size_line);
    if ( line == NULL ) {
        return 1;
    }
    
    for(i=0; i<size_line; i++){
        line[i] = '\0';
    }
    do {
        scanf("%d %d ", &number_words, &number_space);
        if ( number_words != 0 ) {
            space_per_word = number_space / (number_words - 1 );
            upoloipo = number_space % (number_words - 1 );
            for (i=1; i<=number_words; i++){
                scanf("%s", line);
                if (i < number_words ){
                    for (j=0; j<space_per_word +1; j++){
                        strcat(line, " ");
                    }
                    if (upoloipo >0){
                        strcat (line, " ");
                        upoloipo = upoloipo - 1;
                    }
                }
                else{
                    strcat (line, "\n");
                }
                printf ("%s", line);
            }
        }
    }while ( number_words != 0 );
    
    return (0);
}

this programm is called p3
i have a file that contains :
3 3 There is a 2 2 lovely road 2 4 that runs 2 3 from Ixopo 2 5 into the 2 1 hills. These 2 4 hills are 1 0 grass-covered 2 1 and rolling, 3 1 and they are 2 0 lovely beyond 2 2 any singing 3 3 of it. The 2 2 road climbs 2 2 seven miles 3 0 into them, to 1 1 Carisbrooke; 2 5 and from 2 4 there, if 3 2 there is no 2 4 mist, you 3 1 look down on 3 3 one of the 1 6 fairest 2 3 valleys of 1 6 Africa. 0

then :
gcc -Wall -g p3.c -o p3

and
./p3 13 < p2test

when i run it , it prints :
There is a
lovely road
that runs
from Ixopo
into the
hills. These
hills are
Floating point exception (core dumped)

what i did wrong ???

I suggest you run your program through a debugger, finds where it crashes, and check the value of your variables at that point.

Hint: If you look carefully at the following lines of code, you should see why the problem is occurring:

Code:

if ( number_words != 0 ) {
    space_per_word = number_space / (number_words - 1 );

Additional notes:

• You should check that the correct number of arguments are passed to your program (i.e. "argc") before attempting to access "argv"
• Don't cast "malloc()": FAQ > Casting malloc - Cprogramming.com
• Free the memory that you allocate