How to reverse a string using a recursive function, with swapping

#include<stdio.h>

#include<conio.h>

char a1[50];  //GLOABAL VAR.

void reverse(int);

void main()

{

int count=0;

printf("enter the string :");

scanf("%s",a1);

for(int i=0;a1[i]!='\0';i++)

count++;

reverse(count);

getch();

}

void reverse(int count1)

{

char temp;

static int i=0;

  if(i<=count1/2)

    {

   temp=a1[i];

    a1[i]=a1[count1-1];

    a1[count1-1]=temp;

    i++;

   reverse(--count1);

    }

   else

    printf("\nthe reversed string is :%s",a1);

}