StringReverse.cpp

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

void reverse(char *string);
int main()
{
	char origStr1 [] = "abcdfsdfsfd";
	char origStr2 [] = "a";
	char *origStr3 = NULL;
	reverse(origStr1);
	reverse(origStr1);
	reverse(origStr1);
	printf("%s\n",origStr1);
	printf("%s\n",origStr2);
	printf("%s\n",origStr3);
	return 0;
}
void swap(char *start,char *end)
{
	char temp;
	temp = *start;
	*start = *end;
	*end = temp;
}
void reverse(char *string)
{
	if(string == NULL) return;
	if(strlen(string) < 2) return;
	
	char *end = string + strlen(string) - 1;
	
	while((end != string) && (end != string+1))
	{
		swap(string,end);
		end--;
		string++;
	}		
}