编写内联函数inline int xchg(unsigned char n)，计算将unsigned char型n的低四位和高四位交换后的结果。在主函数中输入数据调用函数输出结果。#include<stdio.h>
 inline int xchg(unsigned char n);
int main()
{
unsigned char n;
 int s;
scanf("%c",&n);
s=xchg(n);
printf("%d",s);
return 0;
}
inline int xchg(unsigned char n)
{
 int s;
s=(n<<4)|(n>>4);
return s;
}

#include <stdio.h>

typedef unsigned char type;

type xchg(type n);

int main()
{
    type n, s;
    scanf("%c", &n);
    s = xchg(n);
    printf("%p\n", s);
    return 0;
}
type xchg(type n)
{
    type s;
    s = (n<<4)|(n>>4);
    return s;
}

为什么用题目的函数形式不行呢？，且题目是那么要求的