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Traversing in Array of pointers

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# 8  
Old 06-14-2010
I would do it this way
Code:
# include <stdio.h>
# include <string.h>
int main(void)
{
char *s[] = {
"We will teach you how to..",
"Move a mountain",
"Level a building",
"Erase the past",
"Make a million",
"....all through C!"
};
int count=0,n=0,i=0;
clrscr();
while ( n<6 ) {
   if (*((s[n])+i++)=='e') { ++count;}
    else
 if(*((s[n])+i)=='\0'){
  n++;i=0;}
}
printf("count of e's : %d\n",count);
return 0;
}

Last edited by Scott; 06-14-2010 at 09:21 AM.. Reason: Please use code tags
# 9  
Old 06-14-2010
yes showkat, but you have a magic number for the loop.
i.e. 6.

that is not good practice.
so if you edit the initialiser you have to remember to change the loop number.
my method or the NULL method is the safe way to traverse an array.
# 10  
Old 06-14-2010
yes you are right.. So if I include the statement that you used to get the count of n then combination of you and me will make this program even better- right?
Code:
# include <stdio.h>
# include <string.h>
int main(void)
{
char *s[] = {
"We will teach you how to..",
"Move a mountain",
"Level a building",
"Erase the past",
"Make a million",
"....all through C!"
};
int count=0,i=0;
size_t n = (sizeof s/sizeof(char *))-1;
while ( n >=0) {
   if (*((s[n])+i++)=='e') { ++count;}
    else
 if(*((s[n])+i)=='\0'){
  n--;i=0;}
}
printf("count of e's : %d\n",count);
return 0;
}

Code tags please.
Last edited by jim mcnamara; 06-14-2010 at 10:05 AM.. Reason: Arrays start from zero so need to adjust the value of n accordingly
# 11  
Old 06-15-2010
Quote:
Originally Posted by bigearsbilly
yes showkat, but you have a magic number for the loop.
i.e. 6.
So does your posted code and that is not what the o/p wanted...if you see his 2nd post.
# 12  
Old 06-17-2010
My last code makes it generalized- Don't you think so?
# 13  
Old 06-22-2010
Quote:
Originally Posted by shamrock
So does your posted code and that is not what the o/p wanted...if you see his 2nd post.
er, I fail to see any digits in my posted code!
plus I was only showing a general way to iterate a char**
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