Ios-c_day1___mac/xcode Simple Operation command

2015.1.19

The first day began to study, stay to review after.

MacOS System: Is the UNIX system graphical interface display, development tools: IDE (Xcode) and terminal (terminal)

Shortcut keys:

Command (Windows) + C: Copy

Command + V: paste

Command + x: Cut (only valid within the current application)

Show clipping function under Mac System: Command + x then press option (ALT) +command + V

Command + N: Create a new application

Command + TAB: Switch applications

Command + F: find

Command + Z: Undo

Command + SHIFT + Z: anti-undo

Command + Space: Toggle Input Method

File system:

/: Indicates root directory

User directory: The directory where the current user action is saved

Current directory: The directory in which the user is currently operating, the current directory with "."

Parent directory: The top-level directory of the current directory, with ".." Reference

Absolute path: The directory path, starting with the directory, such as:/users/zhangxueming/downloads

Relative path: The directory path that is computed from the current directory, such as:./downloads

Terminal Operations Command:

Command name + parameter options + command parameters

LS: Displays all files and directories in the current directory

Ls-a: Displays all files and directories in the current directory (including hidden files and directories)

CD + directory path (contains the name of the directory): Enter the directory to the specified path to operate

Hit the CD directly back to the current user directory

PWD: Displays the absolute path of the current operating directory

mkdir: Creating a Directory

mkdir + directory path (the name of the new directory)

RM + Path to file or directory: Delete directory or file

RM-RF + path to file or directory

Path to touch + file (including file name): Create file

TAB: Command completion

MV + src + DST: Move files or directories (modify the name of the directory or file)

cp+-RF + src + DST: Copy the source file or directory to the specified directory

Cat + file path: Display file contents

VIM: The tool for editing text has three modes of operation: Command mode edit mode and visual mode

Command mode: First tap SHIFT +: Then hit command: Set number displays line numbers

To enter edit mode from command mode:

A: The next byte of the current cursor inserts text

I: Insert text in a byte before the current cursor

O: Insert text on the next line of the current cursor

O: Insert text on the previous line of the current cursor

To exit from edit mode to command mode:

Press ESC

In command mode, press X to delete the character specified by the current cursor, and press U to undo the action

DD means delete row (XDD) to delete multiple rows

yy means copying a row (XYY) copies multiple lines

Press P to paste

Move the cursor in vim with the keyboard, not with the mouse

: Wq Save current edits exit

: q! Do not save exit

: W Save Current edits

GCC tools use

Gcc-o executable file name +. C File: Compile. c File Build Executable

./+ executable file name: Execute executable

#include <stdio.h>

Command + A: Check all

Command + R: Run the program

Command + Z: Undo

SHIFT + COMMAND + Z: anti-undo

Control + F: Forward one byte

Control + B: Back one byte

Control + P: Back row

Control + N: Go down one line

Control + E: Move to end of line

Control + A: Move to the beginning of the line

Command +/: Comment Code, uncomment

//

Main function notation:

C99 Standard notation

int main (int argc, const char * argv[])

//{

return 0;

//}

C89 notation

//

int main (void)

//{

printf ("Hello world!\n");

return 0;

//}

Compiler: C language program converted into binary executable program

There can be only one main function in a project

int main (int argc,const char *argv[])

{

#if 0

printf ("Welcome \ n");

printf ("Welcome \ n");

printf ("Welcome \ n");

#endif

printf ("Welcome \ n");

printf ("Welcome \ n");

return 0;

}

Annotation methods

Method One:

//

Method Two:

/* */

Ios-c_day1___mac/xcode Simple Operation command