C++知識備忘錄（自用）

__DATE__和__TMIE__使用

#include<iostream>
using namespace std;

// 注意，是雙下劃線，而不是單下劃線  無需額外頭文件
// __FILE__ 包含當前程序文件名的字符串 
// __LINE__  表示當前行號的整數 
// __DATE__ 包含當前日期的字符串 
// __STDC__  如果編譯器遵循ANSI C標準，它就是個非零值 
// __TIME__ 包含當前時間的字符串 
// __FUNCTION__執行函數
int main()
{
	cout << __FILE__ << endl;
	cout << __LINE__ << endl;
	cout << __DATE__ << endl;
	cout << __TIME__ << endl;
	cout << __FUNCTION__ << endl;
}

結果：

va_list va_start va_arg va_end使用

#include <iostream>
#include <stdarg.h>
using namespace std;
int add(int totalnum...)// totalnum指定了參數的個數,...表示參數不定, 爲定義此類函數必需
{ 
	va_list intlist;// 定義參數表 intlist
	va_start(intlist, totalnum);// 指定開始參數爲totalnum
	cout << totalnum << endl;
	int totaladd = 0;
	for (int i = 0; i < totalnum; i++)
	{
		totaladd += va_arg(intlist, int);// 取出參數類型爲int的參數 你說的fmt是參數的類型如float等
	}
	va_end(intlist);// 參數取完
	return totaladd;
}
void main()
{
	cout << add(5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10) << endl;// 輸出 15 
}

通用縮寫表

縮 寫	全 稱
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