Course 1-record the path to Ios development and course 1 ios

Course 1-record the path to Ios development and course 1 ios

To learn a new language, we often follow international conventions to write a program output: hello, world.

When learning C language, use the following program to print "hello, world ":

# Include <stdio. h> int main () {printf ("hello, world \ n"); return 0 ;}

The first C language program contains: Standard Library Information, main function, and call library function printf function print output: hello, world

 

Similarly, when learning Objective-C, the following program prints the output "hello, world" for the implementation of my first program goal ":

# Import <Foundation/Foundation. h> int main () {NSLog (@ "hello, world"); return 0 ;}

Compared with the two small programs, their subjects are the same, or their code ideas are the same, but they are different in details. After compilation, linking, and running, the output is printed.

Hello, world

A wonderful day begins!