FIXED: Hey I am getting this strange Segmentation Fault in C when I am trying to count the words in a text. Can anyone explain me why and a solution for the seg-fault?
Here is my source code:
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>
int isword(char *str) {
return (isalnum(*(str + 1))) ? 1 : 0;
}
int main() {
char **text, c;
int n, i, j;
//reading from stdin & allocating it dynamically
scanf("%d\n", &n);
text = malloc(n * sizeof(char *));
for(i = 0; i < n; i++) {
text[i] = malloc(200 * sizeof(char));
}
for(i = 0; i < n; i++) {
for(j = 0; ; j++) {
scanf("%c", &c);
if(c == '\n') {
break;
}
text[i][j] = c;
}
}
// Counting words
int word_counter = 0;
char *delimitor = " ";
char *pos;
for(i = 0; i < n; i++) {
pos = text[i];
do {
if(isspace(*pos) && isword(pos)) {
word_counter++;
}
pos ? pos++ : pos;
// pos++;
} while(*pos != '\0');
}
printf("Number of words: %d\n", word_counter);
return 0;
}
Example of input:
4
Adam baked a pie.
Mary went to a movie
Mark goes like ?? him
Gina is, hot
Please notice the excessive uses of spaces in the second sentence.
I also have another question about my reading from stdin
. Is there a better way to achieve this? I mean I tried to do it with fgets
, but I failed, and I know I am not supposed to use gets
(hell, even GCC gives it as a warning if you use gets).
Another question: Why doesn't it print the expected number of words? And it prints 12 instead of 14?
to