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// 关于+1的各种情况 #include <stdio.h> //默认对齐数为4 // 结构体大小为16 struct BBB { long A1; char A2; char A3; long A4; long A5; }; int main() { struct BBB *p; p = (struct BBB *)0x100000; printf("%x\n", p + 0x1);//p是结构体指针,加1加了一个结构体大小,即0x100010 printf("%x\n",(unsigned long) p + 0x1);// p是无符号长整型,加1即加1,即0x100001 printf("%x\n", (unsigned long *)p + 0x1);// p是无符号长整型指针,加1即加一个指针大小4,即0x100004 printf("%x\n",(char *)p + 0x1);// p是字符指针,加1即加字符指针大小1,即0x100001 return 0; }
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原文地址:http://blog.csdn.net/zhaoyaqian552/article/details/45585255