Jan 16, 2012

K & R C Programs Exercise 4-13.

K and R C, Solution to Exercise 4-13:
K and R C Programs Exercises provides the solution to all the exercises in the C Programming Language (2nd Edition). You can learn and solve K&R C Programs Exercise.
Write a C Program to reverse the string using the recursive methods.
In this program reverse determines the length of the string and then calls the reverser, which reverses the string s in place. Read more about C Programming Language .

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#include<stdio.h>
/* reverse: reverse the string s in place */
void reverse(char s[])
{

 void reverser(char s[], int i, int len);
 reverser(s,0,strlen(s));
}

/* reverser: reverse string s in place recursive */
void reverser(char s[], int i, int len)
{
 int c, j;
 j = len - (i + 1);
 if(i < j)
 {
  c = s[i];
  s[i] = s[j];
  s[j] = c;
  reverser(s, ++i, len);
 }
}

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