#define SLEN 128

#include <stdio.h>


int getStrLength(char str[SLEN])
{
	char* p = str;
	int i = 0;
	
	while(*p++) 
	{
		i ++;
	}

	return i;
}

void reverse(char str[SLEN], int size)
{
	int mid, i;
	char tmp;

	mid = size / 2;

	for(i = 0; i < mid; i ++)
	{
		tmp = str[i];
		str[i] = str[size - 1 - i];
		str[size - 1 - i] = tmp;
	}
	return;
}

int main()
{
	char mystring[SLEN], len;

	printf("Please input a string: ");
	scanf("%127s", mystring);

	len = getStrLength(mystring);
	reverse(mystring, len);
	printf("The reversed string is: %s\n", mystring);

	return 0;
}