Objective-C Programming: The Big Nerd Ranch Guide

String literals

If you were dealing with C strings a lot, malloc-ing the memory and stuffing the characters in one by one would be a real pain. Instead, you can create a pointer to a string of characters (terminated with the zero character) by putting the string in quotes. Change your code to use a string literal:

i​n​t​ ​m​a​i​n​ ​(​i​n​t​ ​a​r​g​c​,​ ​c​o​n​s​t​ ​c​h​a​r​ ​*​ ​a​r​g​v​[​]​)​
{​
 ​ ​ ​ ​c​h​a​r​ ​x​ ​=​ ​'​!​'​;​ ​/​/​ ​T​h​e​ ​c​h​a​r​a​c​t​e​r​ ​'​!​'​

 ​ ​ ​ ​w​h​i​l​e​ ​(​x​ ​<​=​ ​'​~​'​)​ ​{​ ​/​/​ ​T​h​e​ ​c​h​a​r​a​c​t​e​r​ ​'​~​'​
 ​ ​ ​ ​ ​ ​ ​ ​p​r​i​n​t​f​(​"​%​x​ ​i​s​ ​%​c​\​n​"​,​ ​x​,​ ​x​)​;​
 ​ ​ ​ ​ ​ ​ ​ ​x​+​+​;​
 ​ ​ ​ ​}​

 ​ ​ ​ ​c​h​a​r​ ​*​s​t​a​r​t​ ​=​ ​"​L​o​v​e​"​;​ ​ ​ ​ ​p​r​i​n​t​f​(​"​%​s​ ...