Reverse a string with recursive function - C

Write a C program to reverse a string using recursive function.

Solution:

#include <stdio.h>
#include <string.h>
void reverse(char str1[], int index, int size)
{
    char temp;
    temp = str1[index];//  t=0 - t=s , 1
    str1[index] = str1[size - index]; // s[0]=a(4)
    str1[size - index] = temp;//s=t
    if (index == size / 2) // 0=2 //1=2
    {
        return;
    }
    reverse(str1, index + 1, size);
}
int main()
{
    char str1[20];
    int size;
    printf("Enter String : ");
    scanf("%s", str1);
    size = strlen(str1);
    reverse(str1, 0, size - 1);
    printf("\nReverse String :  %s\n", str1);
    return 0;
}


Output:

reverse string recursive
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