第二章作业P51.7

#include<iostream>#include<stdio.h>using namespace std;int main(){char ch1,ch2;cin>>ch1>>ch2;char ch;do{if((ch1-ch2)%2==0){if(ch1>ch2)cout<<(char)(ch1+1)<<endl;else cout<<(char)(ch2+1)<<endl;}else{if(ch1<ch2)cout<<(char)(ch1-1)<<endl;else cout<<(char)(ch2-1)<<endl;}printf("是否继续?\[y/n]");while((ch=getchar())!='\n');}while((ch=getchar())=='y');return 0;}