Strings.c

#include <stdio.h>

int getStringLength1(char array[])
{
	if(array)
	{
		int length = 0;
		for(char *p = array; *p != 0; ++p)
		{
			++length;
		}
		
		return length;
	}
	
	return -1;
}

int getStringLength2(char * array)
{
	if(array)
	{
		int length = 0;
		for(char *p = array; *p != 0; ++p)
		{
			++length;
		}
		
		return length;
	}
	
	return -1;
}

int getStringLength3(char * array)
{
	if(array)
	{
		int length = 0;
		while(*array)	// check if null terminator
		{
			++length;
			++array;
		}
		printf("......terminator: [Int](%d)\n", *(array), *(array));
		
		return length;
	}
	
	return -1;
}

void decimalPrint(char * array)
{
	if(array)
	{
		int i = 0;
		for(; array[i] != '\0'; i++)
		{
			printf("%d-",array[i]);
		}
		printf("%d\n",array[i]);
	}
	else
		printf("Error: Array is NULL\n");
}

int main()
{
	char string[] = "Hello world";
	printf("**************************************************\n");
	printf("String content     : %s\n", string);
	printf("Alternate print    : "); decimalPrint(string);
	printf("\n");
	printf("Size of array      : %d\n", sizeof(string) );

	printf("Length of array(1) : %d\n", getStringLength1(string));
	printf("Length of array(2) : %d\n", getStringLength2(string));
	printf("Length of array(3) : %d\n", getStringLength3(string));
	printf("**************************************************\n");
	
	char * string2 = "Fenerbahce is the best!";
	printf("**************************************************\n");
	printf("String content     : %s\n", string2);
	printf("Alternate print    : "); decimalPrint(string);
	printf("\n");
	printf("Size of array      : %d\n", sizeof(string2) );

	printf("Length of array(1) : %d\n", getStringLength1(string2));
	printf("Length of array(2) : %d\n", getStringLength2(string2));
	printf("Length of array(3) : %d\n", getStringLength3(string2));
	printf("**************************************************\n");
	
	return 0;
}