#include <stdio.h>
#include <string.h>
 
#define      ARRAY_SIZE      100
 
int mystrstr(const char *p, const char *q);
void parentheses(char *str, const char *word);
void insert(char *str, int ch, int pos);
 
 
int main()
{
   char a[ARRAY_SIZE];
   char b[ARRAY_SIZE];
 
   printf("\nfirst string: ");
   gets(a);
   printf("second string: ");
   gets(b);
 
   parentheses(a, b);
   printf("\n%s", a);
 
   return 0;
}
 
/*****************************************************
birinci parametresinde bulunan adresteki karakter
dizisi icinde, ikinci paramatresindeki adreste bulunan
karakter dizisini arar. bulundugu yerin indis numarasini
dondurur. araman karakter dizisi bulunamazsa -1 dondurur.
*****************************************************/
int mystrstr(const char *p, const char *q)
{
   int i, j;
   int lenq = strlen(q), lenp = strlen(p);
 
   for (i = 0; i <= lenp - lenq; i++) {
      for (j = 0; q[j] != '\0'; j++)
         if (p[i + j] != q[j])
            break;
      if (q[j] == '\0')
         return i;
   }
   return -1;
}
 
/****************************************************/
void parentheses(char *str, const char *word)
{
   int pos;
 
   if ((pos = mystrstr(str, word)) == -1)
      return;
 
   insert(str, '(', pos);
   insert(str, ')', pos + strlen(word) + 1);
}
/*****************************************************
birinci parametresinde buluna karakter dizisine ikinci
parametresinde bulunan karakteri, bu karakter pos indisli
eleman olacak sekilde yerlestirir.
*****************************************************/
void insert(char *str, int ch, int pos)
{
   int i;
 
   for (i = 0; str[i] != '\0'; i++)
      ;
   for (; i >= pos; i--)
      str[i + 1] = str[i];
   str[pos] = ch;
}