function and strings - C

getchar is nothing to do with the problem which you had.

ssharish

Now i post the hole code from my program. I use realloc function to get as memory as exactly the programm needs.The programm works but i will post it because maybe somebody else want to see the finally answer.
The exercise says this:
make a function with arguments two strings and returns a new string which has the characters from first string that not included in second string.
example: If str1="hello" and str2="halla" then the string that returns the function should be str3="eo".

the function:

Code:

---

char *fun(char *s1, char *s2)
{
 int i,j,l;/* i,j for for loops and l for the array*/
 int found;/*flag*/
 int slen1,slen2;
 char *k=NULL;/* we set the pointer we return with NULL*/

 slen1=strlen(s1);
 slen2=strlen(s2);

 found=0;
 l=0;

 for(i=0; i<slen1; i++)
 {
  found = 0;
  for(j=0; j<slen2; j++)
  { if(s1[i]==s2[j]) /*for each element of s1[i] i check if there is also in s2*/
      { found=1; break;}
     
  }
  if (found==0)
  { 
    k=(char *)realloc(k,sizeof(int));
    k[l++]=s1[i];
  } 
}
return k;
}

---

Now i will give some code that you can test if the function works

Code:

---

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

char *fun(char *s1, char *s2);

int main(void)
{
 char *p1="hello";
 char *p2="hallo";
 char *l;

 l=fun(p1,p2);

 printf(l);
 free(l);/*note that we free the memory*/
 return 0;
}

---

Another more difficult answer is on this post
http://cboard.cprogramming.com/showp...8&postcount=10
from Bokarinho