#include <stdio.h>
#include <string.h>

// Function to reverse the string
// using pointers
void reverseString(char* str)
{
	int l, i;
	char *begin_ptr, *end_ptr, ch;

	// Get the length of the string
	l = strlen(str);

	// Set the begin_ptr and end_ptr
	// initially to start of string
	begin_ptr = str;
	end_ptr = str;

	// Move the end_ptr to the last character
	for (i = 0; i < l - 1; i++)
		end_ptr++;

	// Swap the char from start and end
	// index using begin_ptr and end_ptr
	for (i = 0; i < l/2; i++) {

		// swap character
		ch = *end_ptr;
		*end_ptr = *begin_ptr;
		*begin_ptr = ch;

		// update pointers positions
		begin_ptr++;
		end_ptr--;
        
	}
}

// Driver code
int main()
{
    char str[100];
	printf("Enter a string: ");
    scanf("%s", str);

	// Reverse the string
	reverseString(str);

	// Print the result
	printf("Reverse of the string: %s\n", str);

	return 0;
}