输出英文字母的前驱和后继字母与ASCII值

char c;
scanf("%c",&c);
char f=c-1;
char b=c+1;
printf("前驱：%c 后继：%c ASCLL：%d",f,b,c);

#include<stdio.h>
int main()
{
char middle;
scanf("%c",&middle);
if(middle>='a')
{
if (middle=='a')printf("%c %d\n%c %d",'z','z','b','b');
else if(middle=='z')printf("%c %d\n%c %d",'y','y','a','a');
else printf("%c %d\n%c %d",middle-1,middle-1,middle+1,middle+1);
}
else
{
if (middle=='A')printf("%c %d\n%c %d",'Z','Z','B','B');
else if(middle=='Z')printf("%c %d\n%c %d",'Y','Y','A','A');
else printf("%c %d\n%c %d",middle-1,middle-1,middle+1,middle+1);
}
}
是WHUT的同学吗