引用int型的8位字节

/*----------------------     引用int型的8位字节/*---------------------*/#include <stdio.h>int main(void){int i;unsigned char ch;int num = -555;     //11111111 11111111 11111101 11010101for(i = 0; i < sizeof(int); i++){ch = ((unsigned char *)&num)[i];printf("%x ",ch);}printf("\n\n");return 0;}

&num                                 //指向num的int型指针

(unsigned char *)&num     //指向num的unsigned char型指针