C++知识备忘录（自用）

__DATE__和__TMIE__使用

#include<iostream>
using namespace std;

// 注意，是双下划线，而不是单下划线  无需额外头文件
// __FILE__ 包含当前程序文件名的字符串 
// __LINE__  表示当前行号的整数 
// __DATE__ 包含当前日期的字符串 
// __STDC__  如果编译器遵循ANSI C标准，它就是个非零值 
// __TIME__ 包含当前时间的字符串 
// __FUNCTION__执行函数
int main()
{
	cout << __FILE__ << endl;
	cout << __LINE__ << endl;
	cout << __DATE__ << endl;
	cout << __TIME__ << endl;
	cout << __FUNCTION__ << endl;
}

结果：

va_list va_start va_arg va_end使用

#include <iostream>
#include <stdarg.h>
using namespace std;
int add(int totalnum...)// totalnum指定了参数的个数,...表示参数不定, 为定义此类函数必需
{ 
	va_list intlist;// 定义参数表 intlist
	va_start(intlist, totalnum);// 指定开始参数为totalnum
	cout << totalnum << endl;
	int totaladd = 0;
	for (int i = 0; i < totalnum; i++)
	{
		totaladd += va_arg(intlist, int);// 取出参数类型为int的参数 你说的fmt是参数的类型如float等
	}
	va_end(intlist);// 参数取完
	return totaladd;
}
void main()
{
	cout << add(5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10) << endl;// 输出 15 
}

通用缩写表

缩 写	全 称
Addr	Address
Adm	Administrator
App	Application
Arg	Argument
Asm	assemble
Asyn	asynchronization
Avg	average
DB	Database
Bk	back
bmp	Bitmap
btn	Button
buf	Buffer
calc	Calculate
char	Character
chg	Change
clk	Click
clr	color
cmd	Command
cmp	Compare
col	Column
coord	coordinates
cpy	copy
ctl / ctrl	Control
cur	Current
cyl	Cylinder
dbg	Debug
dbl	Double
dec	Decrease
def	default
del	Delete
dest / dst	Destination
dev	Device
dict	dictionary
diff	different
dir	directory
disp	Display
div	Divide
dlg	Dialog
doc	Document
drv	Driver
dyna	Dynamic
env	Environment
err	error
ex/ext	Extend
exec	execute
flg	flag
frm	Frame
func / fn	Function
grp	group
horz	Horizontal
idx / ndx	Index
img	Image
impl	Implement
inc	Increase
info	Information
init	Initial/Initialize/Initialization
ins	Insert
inst	Instance
INT / intr	Interrupt
len	Length
lib	Library
lnk	Link
log	logical
lst	List
max	maximum
mem	Memory
mgr / man	Manage / Manager
mid	middle
min	minimum
msg	Message
mul	Multiply
num	Number
obj	Object
ofs	Offset
org	Origin / Original
param	Parameter
pic	picture
pkg	package
pnt / pt	Point
pos	Position
pre / prev	previous
prg	program
prn	Print
proc	Process / Procedure
prop	Properties
psw	Password
ptr	Pointer
pub	Public
rc	rect
ref	Reference
reg	Register
req	request
res	Resource
ret	return
rgn	region
scr	screen
sec	Second
seg	Segment
sel	Select
src	Source
std	Standard
stg	Storage
stm	Stream
str	String
sub	Subtract
sum	summation
svr	Server
sync	Synchronization
sys	System
tbl	Table
temp / tmp	Temporary
tran / trans	translate/transation/transparent
tst	Test
txt	text
unk	Unknown
upd	Update
upg	Upgrade
util	Utility
var	Variable
ver	Version
vert	Vertical
vir	Virus
Wnd	Window