题解 | #字符串的反码#

#include <bits/stdc++.h>
using namespace std;
//如何判断字母大小写 
int main(){
	char s[81];
	cin>>s;
	int c;
	for(int i=0;i<strlen(s);i++){
		if(s[i]>='a'&&s[i]<='z'){
			c='z'-s[i];
			s[i]='a'+c;	
		}else if(s[i]>='A'&&s[i]<='Z'){
			c='Z'-s[i];
			s[i]='A'+c;
		}
	}
	cout<<s<<endl;
	return 0;
}