c 语言大小端格式判断

#include<stdio.h>

int checkcpu()
{
    union w{
 
  int a;
  char b;
 }c;
 c.a=1;
 return c.b;                  char型可以带便为整型值

}

int checkcpu2()
{
   int x=1;
   char *p=(char *)&x;
   return *p;

}

int main()
{

 
 printf("%d\n",checkcpu());
 printf("%d",checkcpu2());
 return 0;
}