Linux and Windows batch name generation by date

Windows bat Batch File

The code is as follows	Copy Code
@echo off Set time_hh=%time:~0,2% if/i%time_hh% LSS (set time_hh=0%time:~1,1%) Set filename=%date:~,4%%date:~5,2%%date:~8,2%_%time_hh%%time:~3,2%%time:~6,2% echo Test >>%filename%.txt

Linux shell

The code is as follows	Copy Code
#!/bin/sh echo Test >> $ (date-d "Today" + "%y%m%d_%h%m%s"). txt

Provides some command references about the Linux shell.

The functionality to implement	C Language Programming	Linux Shell Script Programming
Parameter passing of program/script	int main ( int argc, char** argv) { if ( argv!= 4) {     printf ("Usage:%s arg1 arg2 Arg3 ", argv[0]);     return 1; }   printf ("arg1:%s/n", argv[1]); printf ("arg2:%s/n", argv[2]); printf ("arg3:%s/n", argv[3]); return 0; }	#!/bin/ sh   if [$#- Span>lt 3]; Then     echo Usage: ' basename $ ' arg1 arg2 arg3 ' >&2     exit 1 fi   echo "Arg1: $" echo "arg2: $" echo "Arg3: $" Exit 0
	int main ( int argc, char** argv) {     int i; for ( i=1; i<=argc;i++) { printf (" arg:%s /n ", Argv[i]); } return 0; }	#!/bin/ sh   While [$#- ne 0] do & nbsp;   echo "ARG: $"     shift do Ne
Logical/numeric operations	if (d = = 0)	If ["$D"- eq "0"]; then
	if (d!= 0)	If ["$D"- ne "0"]; then
	if (d > 0)	If ["$D"- GT "0"]; then
	if (d < 0)	If ["$D"- LT "0"]; then
	if (d <= 0)	If ["$D"-le "0"]; Then
	if (d >= 0)	If ["$D"- ge "0"]; then
String comparisons	if ( strcmp (str, "abc") ==0) { }	If ["$STR"!= " abc"]; then Fi
Input and output	scanf ("% D", &d);	Read D
	printf ("%d", d);	Echo–n $D
	printf ("% D", d);	Echo $D
	printf ( "Press any to continue ..."); Char Ch=getchar (); printf ("/ nyou pressed:%c/n", ch);	#!/bin/ SH GetChar () { savedtty= ' stty-g ' Stty Cbreak DD if=/dev/ TTY Bs=1 count=1 2>/dev/null stty - cbreak Stty $SAVEDTTY } Echo -n "Press any key to continue ..." Ch= ' getchar ' echo "" echo "You pressed: $CH"
		Read D <&3
program/script Control process	if ( isOK) {    //1 } else if (isOK2) {    //2 } else {    //3 }	if [ IsOK]; then     #1 elif [isOK2]; then     #2 Else     #3 fi
	switch (d) { Case 1: printf ("you select 1/n"); break; Case 2: Case 3: printf ("Select 2 or 3/n"); break; Default: printf ("error/n"); break; };	case $D in 1) echo ' you select 1 '    ; 2|3) echo "you select 2 or 3"    ; *) echo "error"    ; esac
	for ( int loop=1; loop<=5;loop++) { printf ("%d", loop); }	For loop in 1 2 3 4 5 Todo Echo $loop Done
	do { Sleep (5); while (! isRoot);	Is_root= ' who | grep Root ' Until ["$IS _root"] Todo Sleep 5 Done
	counter=0; while (Counter < 5) { printf ("%d/n", counter); counter++; }	Counter=0 While [$COUNTER- LT 5] Todo Echo $COUNTER Counter= ' expr $COUNTER + 1 ' Done
	while (1) { }	While: Todo Done
	Break	Break or break n,n means jump out of n-level loops
	Continue	Continue
Definitions of functions and procedures	void Hello () { printf ("hello/n"); } ... Function call Hello ();	Hello () { Echo "Hello" } or function Hello () { Echo "Hello" } ... #函数调用 Hello
function parameters and return values	int ret = doIt (); if (ret = 0) {     printf ("ok/n"); }	doIt if [$?] – eq 0]; then echo "OK" fi or RET = doIt If [$RET]- eq "0" ] ; Then echo "OK" fi
	int sum ( int a,int b) { return a+b } int s = sum (1,2); printf ("The sum is:%d/n", s);	sum () {  &nb sp;  echo-n "Expr $ + $" } s= ' sum 1 2 ' Ech O "The sum is: $S"
	BOOL IsOK () {return false;} if ( IsOK) { printf ("yes/n"); } else { printf ("no/n"); }	IsOK () { return 1; } If IsOK; then echo "YES" Else echo "NO" Fi