/*
 * Very very simple program illustrating two ways to work with strings.
 */
#include <stdio.h>

/* 
 * two functions to get length of string 
 * purely illustrative/pedagogical since the standard library has strlen
 */
int string_length_array(char s[]);
int string_length_pointer(char * s);

int main(void) {
	printf("string '%s'\n", "hello world");
	printf("length %d\n", string_length_array("hello world"));
	printf("length %d\n", string_length_pointer("hello world"));
	printf("string '%s'\n", "bye!");
	printf("length %d\n", string_length_array("bye!"));
	printf("length %d\n", string_length_pointer("bye!"));
	return 0;
}

int string_length_array(char s[]) {
	int index = 0;
	while (s[index] != '\0') ++index;
	return index;
}

int string_length_pointer(char * s) {
	char * p = s;
	while (*p != '\0') ++p;
	return (p-s);
}