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    01    // P174: 2.±à³ÌÌâ (13)²»ÀûÓÃstrcmpº¯Êý£¬×Ô¼º±à³ÌʵÏÖÁ½¸öÈÎÒâ×Ö·û´®µÄ±È½Ï¡£
    02   
    03    // The beginning of C program: test06-13.c.
    04   
    05    // Header files included.
    06    #include <stdio.h>
    07   
    08    // Macro definition.
    09    #define MAX_SIZE 100
    10   
    11    // No.1: Subroutine: int getstr ( char ch[], int size );
    12    int  getstr ( char ch[], int size )
    13    {
    14        int    i=0;
    15        if ( size >= MAX_SIZE )
    16        {
    17            printf ( "Input error, data will overflow!\n" );
    18            return  (0);
    19        }
    20        do
    21        {
    22            ch[i] = getchar();
    23            i++;
    24        } while ( ch[i-1] != '\n' );
    25        ch[i-1] = '\0';
    26        // ·µ»Ø0±íʾµ÷Óøú¯ÊýÀ´»ñÈ¡×Ö·û´®Ê±»ñÈ¡Ê


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which(ѰÕÒ“Ö´ÐÐÎļþ”)
[root@localhost home]# which [-a] command
-a : ½«ËùÓпÉÕÒµ½µÄÃüÁî¾ùÁгö£¬¶ø²»½ö½öÁгöµÚÒ»¸öÕÒµ½µÄÃüÁîÃû³Æ
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[root@localhost home]# which passwd
/usr/bin/passwd ......

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[root@localhost /]# shutdown [-tÃë] [-arkhcncfF] [ʱ¼ä] [ÌáʾÐÅÏ¢]
[root@localhost /]# shutdown -h 10 'I will shutdown after 10 mins'
-t sec : -t ºó¼ÓÃëÊý£¬¼´‘¹ý¼¸ÃëÖÓºó¹Ø»ú’µÄÒâ˼¡£
-k : ²»ÒªÕæµÄ¹Ø»ú£¬Ö»ÊÇ·¢ËÍÌáʾÐÅÏ¢¡£
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cygwin ʹÓÃmake menuconfig ÅäÖÃlinuxÎÊÌâ¼°½â¾ö·½·¨

ÔÚÖ´ÐÐmake menuconfig ÃüÁî½øÐÐÄÚºËÅäÖÃʱ£¬Êä³öÏÂÃæµÄ³ö´íÐÅÏ¢£º
yyh:~/clfs/sources/linux-2.6.17.13$ make ARCH=i386 CROSS_COMPILE=${CLFS_TARGET}- menuconfig
HOSTCC scripts/basic/fixdep
HOSTCC scripts/basic/split-include
HOSTCC scripts/basic/docproc
HOSTCC scripts/kconfig/conf.o
HOSTCC scri ......
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