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系统:macOC 10.13
Xcode:9.2
int main(int argc, const char * argv[]) {
// insert code here...
int i = 0x12345678;
printf("%lu\n", sizeof(int));
printf("i 的地址是:%p\n", &i);
char *p = (char *)&i;
printf("%p==>%x\n",p, i);
printf("%p==>%x\n",p, p[0]);
printf("%p==>%x\n",p+1, p[1]);
printf("%p==>%x\n",p+2, p[2]);
printf("%p==>%x\n",p+3, p[3]);
return 0;
}
结果如下:
4
i 的地址是:0x7ffeefbff64c
0x7ffeefbff64c==>12345678
0x7ffeefbff64c==>78
0x7ffeefbff64d==>56
0x7ffeefbff64e==>34
0x7ffeefbff64f==>12
Program ended with exit code: 0
从结果可以看出int类型占4个字节的存储空间,并且低位字节排放在内存的低地址端。