从 10101011 这种机器才能识别的语言,极其容易出错, 到c语言基础语言 , 连内存释放都要自己手动操作, 到list这种世界最聪明的语言,有浓厚的数学氛围. 他是第一个能把面向对象来用,能把函数作为参数进行传递,这是函数式编程基础,这语言出现于1965年,数学家发明的...至今无法超越,
然后有了java,其实个人不喜欢这种繁琐的语言,他是静态语言,他是由sum公司带来了大量的用户. python - 最受外国人欢迎的语言 ruby - 1993年由日本人,松本宏行发明的, 我正在看松本宏行的程序世界这本书. JavaScript - 有一个外国人10天就发明了, 至今发布到es9,仍在打补丁,有了服务器端脚本语言nodejs php - 服务器脚本语言
从上到下,可以看出,计算机语言越来越人性化了,这真是构建了一道人和机器沟通桥梁 那么java这种反人类代码一定会被淘汰吧..毕竟我都不会,一行java都没写过.
c里面不允许出现标识符 % & $
keep word | descript |
---|---|
auto | auto declare variable |
break | jump out loop |
case | branch of key word |
char | decarible variable or function return type |
const | decarible variable which only read |
continue | to jump to next loop |
default | the last branch of switch |
do | the loop statement main body |
double | to declare an double float point variable |
else | the IF-else statment branch |
enum | to declare enumerate type |
extern | declare variable or function in file or files's place |
float | declare an single float variable or function return value |
for | the loop statement |
goto | jump word without conditions |
if | if-elseif-else statement |
int | to declare an integer variable |
long | to declare an longer integer variable or function return value |
register | to declare an store variable |
short | to declare an short integer value |
signed | to declare an variable with symbol , or declare an function return value |
sizeof | to calculator the size && type of value |
static | declare an static variable |
switch | declare a switch statement |
typedef | give data another name |
unsigned | declare variable without symbol or function |
union | declare union variable |
void | declare function which has no value to return or has no arguments, or declare no-type point |
volatile | it is said that variable which can be change while running |