A brief review of C language Li Hongqiang iOS development

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Main.m

- Brief Review

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Created by Vic fan on 16/7/13.

copyright©2016 year Li Hongqiang . All rights reserved.

//

History of the C language

KRC 's Standard

Need to know the C language standard :

KRC

C89 Standard -ANSI C

C99

C11

what does a complete C language consist of?

Functions and declarations

The C language must have a main function , and the function name cannot have duplicates

C language is not a concept of function overloading

The main function is the entrance to the program, the main function ends , and the program ends

C Language programs can be placed in multiple files

A function of a class of functions is placed in a file or a folder

A set of pass-through types of functions , or related functions placed in a file

Basic syntax :

the format of the main function :

1) int main (void) {

...

}

2)int main (int argc Char*const argv[]) {

...

}

Notes :

/* Multiline comment , not nested , This is the standard note for the C language * /

starting with two slashes , the contents of the following are all ignored

C language involves the syntax :

function :

Variables - used to store temporary data

Branching structure

Loop structure

What is an array

What is a pointer?

Structure

Linked list

...

keywords for C language

three

A data type related

B Process Control - related

#import <Foundation/Foundation.h>

int Main (int argc, const Char * argv[]) {

@autoreleasepool {

//Insert code here ...

NSLog(@ "Hello, world!" );

}

return 0;

}

A brief review of C language Li Hongqiang iOS development