题解 | #字符串加解密#
字符串加解密
https://www.nowcoder.com/practice/2aa32b378a024755a3f251e75cbf233a
#include <cctype>
#include <iostream>
using namespace std;
void encode(string& s){
for(auto ch:s){
if(isalpha(ch)){
if((ch-'a')>=0){
ch = toupper(ch);
if(ch=='Z')ch='A';
else ch++;
}
else{
ch = tolower(ch);
if(ch=='z')ch='a';
else ch++;
}
cout<<ch;
}else{
int t = ch-'0';
t++;
cout<<t%10;
}
}
cout<<endl;
}
void decode(string& s){
for(auto ch:s){
if(isalpha(ch)){
if((ch-'a')>=0){
if(ch=='a')ch='z';
else ch--;
ch = toupper(ch);
}
else{
if(ch=='A')ch='Z';
else ch--;
ch = tolower(ch);
}
cout<<ch;
}else{
int t = ch-'0';
t--;
cout<<(t+10)%10;
}
}
cout<<endl;
}
int main() {
char ch;
string s1;
string s2;
cin>>s1>>s2;
encode(s1);
decode(s2);
}
// 64 位输出请用 printf("%lld")
