[C語言]C 字串的問題

C 字串的問題

char *number1[3] = {"asdf", "qwer", "zxcv"};
printf("%s", number1[0]);

這樣會印出asdf，不過我不理解為甚麼printf後面放的是number1[0]而非*number1[0]?

我的理解是number1[0]存放的應該是一個記憶體位置，而*number1[0]才是指向asdf的實際位置，不曉得對不對?

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說明如下:

char *number1[3] = {"asdf", "qwer", "zxcv"};


number1是字元指標陣列.. 所以初指值指向3個字串位址
number1[0] --> "asdf"
number1[1] --> "qwer"
number1[2] --> "zxcv"


變數名稱　　變數記憶體位址    內容(假設)　
number1[0]　　&number1[0]         0x7ff0
number1[1]　　&number1[1]         0x7ff6
number1[2]　　&number1[2]         0x7fff


記憶體位址       內容
                        0    1     2      3    4
0x7ff0             'a'   's'    'd'    'f'   '\0'
0x7ff6             'q'   'w'   'e'    'r'   '\0'
0x7fff              'z'   'x'   'c'    'v'   '\0'


(1) *number1[0] ==>'a'
(2) *(number1[0]+1) ==>'s'
(3) number[0] 的型態是 char * ,內容是0x7ff0
(4) number[0][0] 的型態是 char,內容是'a'


printf 的%s 輸出字串, 必須提供字串位址

printf("%s\n","asdf") ==> asdf
printf("%s\n",number1[0] ) ==> asdf
printf("%c\n",number1[0][0]) ==> a
printf("%c\n",number1[0][1]) ==> s
printf("%c\n",*number1[0] ) ==> a
printf("%c\n",*(number1[0]+1) ) ==> s