foo bar baz qux

"foo" "bar" "baz" "qux"

arbitrary words in computer science

v3

C 裡面 main 的型態

int main (void) {
}


int main (int argc, char* argv[]) {
}


"argc" : "argument count"
"argv" : "argument vector"
"vector" : is just a fancy way of saying "array"


v3

Terminal Window

Command line

commands

much more powerful

Clang 編譯器 (compiler)

Clang is the name of a compiler

編譯器

a program that converts source code into object code (0's and 1's)

command to compile a file: "clang hello.c"

command for running object code file: "./a.out"
("." represents the current folder 目前所在的資料夾)


command:to 編譯 "clang -o hello hello.c"
then, command to 執行: "./hello"

Gedit

1. Color coding:

save a file with the ".c" extension and Gedit will color code the source code in the file

例: "hello.c"

2. to open a file using Gedit: "gedit holloyway.c"

jharvard

"jharvard" is the user account created for everyone to use, hence it is seen at the command prompt

David Malan uses Gedit in Fedora

CS50 appliance

a free software called a hypervisor

Different terms for the same thing - function

function = method = procedure

程式語言 Programming Language - String

程式語言 programming language 中的 "String" 是指 : "a sequence of zero or more characters"

C 語言 - Statement

Statement:  an instruction to do something

例:

printf("hello, world!\n");

the "f" in printf stands for "format"

從 Scratch 轉換到 C 語言 - first C program

#include <stdio.h>

int main(void)
{

printf("hello, world!\n");
return 0;

}

哈佛 CS50 Walkthroughs

cs50.net/psets

哈佛 CS50 筆記

CS50 Scribe Notes: (linked on lectures page)

a canonical set of notes written by a TA

snarky footnotes at the bottom

哈佛 CS50 庫存網址

哈佛 CS50 課程庫存網址 (Harvard University Computer Science Course):

cs50.tv