#include <stdio.h>
typedef unsigned char u;
int main()
{
u8 a[] = {'0x51', '0x52', '0x53', '0x55','\0'}; //这种写法，后面要加'\0' ，否则 sizeof(a) = 4， printf溢出
int n = sizeof(a); //5
printf("n = %d\n",n); //1235
printf("%s\n",a);
}
/*
int main()
{
char a[]="abcd";
printf("%d\n",sizeof(a)); //5
printf("%s\n",a);
}*/