Objective-C Programming: The Big Nerd Ranch Guide

char *

A C string is just a bunch of characters right next to each other in memory. The string ends when the character 0x00 is encountered.

Figure 39.1  The word “Love” as a C string

Functions that take C strings expect the address of the string’s first character. strlen(), for example, will count the number of characters in a string. Try building a string and using strlen() to count the letters:

#include <stdio.h>  // For printf
#include <stdlib.h> // For malloc/free
#include <string.h> // For strlen int main (int argc, const char * argv[]) { char x = '!'; // The character '!' while (x <= '~') { // The character '~' printf("%x ...