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1
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绛旀锛?/p>
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2
锛?/p>
char * const p
char const * p
const char *p
涓婅堪涓変釜鏈変粈涔堝尯
鍒紵
绛旀锛?/p>
char * const p; //
甯搁噺鎸囬拡锛?/p>
p
鐨勫�间笉鍙互淇敼
char const * p
锛?/p>
//
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const char *p
锛?/p>
//
鍜?/p>
char const *p
锛?/p>
3
锛?/p>
char str1[] = "abc"; char str2[] = "abc"; const char str3[] = "abc"; const char str4[]
= "abc"; const char *str5 = "abc"; const char *str6 = "abc"; char *str7 = "abc"; char
*str8 = "abc"; cout < < ( str1 == str2 ) < < endl; cout < < ( str3 == str4 ) < < endl; cout
< < ( str5 == str6 ) < < endl; cout < < ( str7 == str8 ) < < endl;
缁撴灉鏄細
0
0
1
1
str1,str2,str3,str4
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str5,str6,str7,str8
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锛?/p>
4
锛変互涓嬩唬鐮佷腑鐨勪袱涓?/p>
sizeof
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[C
鏄?/p>
]
void
UpperCase(
char
str[]
)
//
灏?/p>
str
涓殑灏忓啓瀛楁瘝杞崲鎴愬ぇ鍐欏瓧姣?/p>
{
for(
size_t
i=0;
i
<sizeof(str)/sizeof(str[0]);
++i
)
if(
'a'
<=str[i]
&&
str[i] <='z' )
str[i] -= ('a'-'A' ); } char str[] = "aBcDe"; cout < < "str
瀛楃
闀垮害涓?/p>
: " < < sizeof(str)/sizeof(str[0]) < < endl; UpperCase( str ); cout
< < str < <
endl;
绛旀锛氬嚱鏁板唴鐨?/p>
sizeof
鏈夐棶棰樸�傛牴鎹娉曪紝
sizeof
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str
鏄竴涓潤鎬?/p>
瀹氫箟鐨勬暟缁勶紝鍥犳鍏跺ぇ灏忎负
6
锛屽洜涓鸿繕鏈?/p>
'\0'
锛屽嚱鏁板唴鐨?/p>
str
瀹為檯鍙槸涓�涓寚鍚戝瓧
绗︿覆鐨勬寚閽堬紝
娌℃湁浠讳綍棰濆鐨勪笌鏁扮粍鐩稿叧鐨勪俊鎭紝
鍥犳
sizeof
浣滅敤浜庝笂鍙皢鍏跺綋
鎸囬拡鐪嬶紝涓�涓寚閽堜负
4
涓瓧鑺傦紝鍥犳杩斿洖
4
銆?/p>
锛?/p>
5
锛変竴涓?/p>
32
浣嶇殑鏈哄櫒
,
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鎸囬拡鏄灏戜綅鍙鐪嬪湴鍧�鎬荤嚎鐨勪綅鏁板氨琛屼簡銆?/p>
80386
浠ュ悗鐨勬満瀛愰兘鏄?/p>
32
鐨?/p>
鏁版嵁鎬荤嚎銆傛墍浠ユ寚閽堢殑浣嶆暟灏辨槸
4
涓瓧鑺備簡銆?/p>
6
銆?/p>
main()
{
int
a[5]={1,2,3,4,5};
int
*ptr=(int
*)(&a+1);
printf("%d,%d",*(a+1),*(ptr-1)); }
绛旀锛?/p>
2
銆?/p>
5 *(a+1
锛夊氨鏄?/p>
a[1]
锛?/p>
*(ptr-1)
灏辨槸
a[4],
鎵ц缁撴灉鏄?/p>
2
锛?/p>
5 &a+1
涓嶆槸棣栧湴鍧�
+1
锛?/p>
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a
鏁扮粍鐨勫亸绉伙紝
鏄亸绉?/p>
浜嗕竴涓暟缁勭殑澶у皬
锛堟湰渚嬫槸
5
涓?/p>
int
锛?/p>
int *ptr=(int *)(&a+1);
鍒?/p>
ptr
瀹為檯鏄?/p>
&(a[5]),
涔熷氨鏄?/p>
a+5
鍘熷洜濡備笅锛?/p>
&a
鏄暟缁勬寚閽堬紝鍏剁被鍨嬩负
int
(*)[5];
鑰屾寚閽堝姞
1
瑕佹牴
鎹寚閽堢被鍨嬪姞涓婁竴瀹氱殑鍊硷紝涓嶅悓绫诲瀷鐨勬寚閽?/p>
+1
涔嬪悗澧炲姞鐨勫ぇ灏忎笉鍚?/p>
a
鏄暱搴︿负
5
鐨?/p>
int
鏁扮粍鎸囬拡锛?/p>
鎵�浠ヨ鍔?/p>
5*sizeof(int)
鎵�浠?/p>
ptr
瀹為檯鏄?/p>
a[5]
浣嗘槸
prt
涓?/p>
(&a+1)
绫诲瀷鏄笉涓�鏍风殑
(
杩欑偣寰堥噸瑕?/p>
)
鎵�浠?/p>
prt-1
鍙細鍑忓幓
sizeof(int*) a,&a
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a
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a[0]
鐨勫湴鍧�锛?/p>
&a
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