Editing a C Program

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Editing a C Program

• 01/15/16

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Objective

• Use Linux to edit, compile and execute a C program

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Login and Password

• Dont lose it
• Keep password a secret

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Steps to Run a C program

• Login into onyx
• Edit the program using vi or vim
• Compile the program with gcc
• Execute the program with a.out
• Logout out of onyx

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Two Modes in vim

• Command
• Insert

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vim

• I want to write a program whose output is
• Martin Luther King said
• I have a dream.
• I will write a C program to do that.
• I will use the vim editor to create the program.

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To Execute a Program

• vim prog.c
• Edit the program
• Save with wq
• gcc prog.c
• Compile the program.
• If there are errors, correct and recompile.
• a.out
• Executes the program

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Logout

• exit
• Right click on desk top
• Select leave
• Select logout button
• Important

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vim Commands

• a, i -- Get into insert mode
• ltescgt -- Get back to command mode
• x -- delete a character
• dd -- delete a line
• p -- paste
• u -- undo
• wq -- write and quit
• q! -- quit without saving.
• arrow keys -- move around

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More vim Commands

• 3x -- Number makes command happen that many
  times.
• r replace
• n move cursor to line n
• You should know the commands in the vimtutor,
  Lessons 1 through 3

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More Linux

• Command Format
• command -options arguments
• Commands to know
• ls, lpr, cp , rm, mv,
• mkdir, mv(to a directory), cd, cd .., rmdir
• man, more, cat
• exit

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Login from Remote Site

• You can get mobaxterm or other ssh software if
  you have a PC
• For Macs see me.

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Engr 213 214

• Labs for Comp Sci.

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Assignment

• See the website for assignment.

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Next Week

• Getting Started in C Programming