#include <stdio.h>
#include <stdlib.h>

char *s1 = "This is a long string. Even more than one sentence!";

 int strLength(char *string)
 {
	int length = 0;
	while(*string != '\0'){
		string++; // string = string +1;
		length++;
	}
	return length;
 }

char * mystrcpy ( char * destination, const char * source)
{
	int k;
	k = 0;
	while( source[k] != '\0' ){
		destination[k] = source[k];
		//*(destination + k) = *(source+k);
		k++;
	}
	destination[k] = '\0';
	return destination;
}

void myStrInverter(char* start)
{
	char *end, tmp;
	// räkna ut pekaren till sista tecknet (ej null)
	end = start;
	while(*end){
		end++;
	}
	end--;
	
	// swappa ett tecken
	while(end > start){
		tmp = *end;
		*end = *start;
		*start = tmp;
		start++;
		end--;
	}
}
int main(int argc, char **argv)
{
	char* myString2;
	int length = strLength(s1);
	
	myString2 = (char*)malloc((length+1)*sizeof(char));	
	myString2 = mystrcpy(myString2, s1);
	myStrInverter(myString2);
	
	printf("The length of s1 was %i\n", length);
	printf("s1: %s\n", s1);
	printf("myString2: %s\n", myString2);
	printf("hello world\n");
	return 0;
}