[問題] 指標變數相減問題

看板Programming作者garlos (綠豆開心果)時間12年前 (2011/10/29 03:22)推噓2(2推 0噓 15→)

留言17則, 5人參與討論串1/1

請問各位強者大大寫了一個很小的程式來驗證指標變數相減的結果 #include <stdio.h> int main(int argc, char *argv[]){ int *a = (int *)0x1ff1234; int *b = (int *)0x1ff0000; int c = (int )a; int d = (int )b; printf("a = %p\n", a); printf("b = %p\n", b); printf("substract a - b value = %p\n", a - b ); printf("substract c - d value = %p\n",c - d ); return 0; } ================================== 輸出結果為 a = 0x1ff1234 b = 0x1ff0000 substract a - b value = 0x48d substract c - d value = 0x1234 小弟愚鈍的是為甚麼 a - b 不是 0x1234 呢不就指標指向的address 相減嗎非常感謝解惑! -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 111.185.75.196

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james732

10/29 03:23, , 1^F

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james732

10/29 03:24, , 2^F

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lmr3796

10/29 13:21, , 3^F

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