#include<iostream> using namespace std; int main(){ char c=getchar(); if(c-1>=32 && c-1<=126){ cout<<c-1<<endl; }else{ cout<<"Input Error!"<<endl; } if(c+1>=32 && c+1<=126){ cout<<c+1<<endl; }else{ cout<<"Input Error!"; } /** char n=getchar(); if(n>='A' and n<='Z'){ cout<<char(n-32); }else{ if(n>='a' and a<='z'){ cout<<char(n-32); }else{ if(n>='0' and n<='9'){ cout<<n-'0'; }else{ cout<<"Other"; } } } **/ return 0; }