C program 05

5    Print the reverse of a string using recursion

           

#include <stdio.h>

#include <string.h>

void reverse(char [], int, int);  /*function declaration*/

int main()

{

    char str1[20];

    int size;

    printf("Enter a string to reverse: ");

    scanf("%s", str1);

    size = strlen(str1);

    reverse(str1, 0, size - 1);

    printf("The string after reversing is: %s\n", str1);

    return 0;

}

void reverse(char str1[], int index, int size) /*function definition*/

{

    char temp;

    temp = str1[index];

    str1[index] = str1[size - index];

    str1[size - index] = temp;

    if (index == size / 2)

    {

        return;

    }

    reverse(str1, index + 1, size);

}

Output