题解 | #字符串加解密#

let line

function getRes(str,order){
     let arr = str.split('');
     let temp = ''
     for(let i =0;i<arr.length;i++){
         
         let reg = /[a-z]/
         let reg1 = /[A-Z]/
         let reg2 = /[0-9]/
         if(order){
             if(reg.test(arr[i])){
                 let dot = arr[i].toUpperCase().charCodeAt(0);
                 if(dot == 'Z'.charCodeAt(0)){
                     temp+='A'
                 }else{
                     let res = String.fromCharCode(dot + 1)
                     temp+=res
                 }
             }else if(reg1.test(arr[i])){
                 let dot = arr[i].toLowerCase().charCodeAt(0);
                  if(dot == 'z'.charCodeAt(0)){
                     temp+='a'
                 }else{
                     let res = String.fromCharCode(dot + 1)
                     temp+=res
                 }
             } else if(reg2.test(arr[i])){
                 if(arr[i] == '9'){
                      temp+='0'
                 }else{
                    let res = parseInt(arr[i]) + 1;
                     temp+=res.toString()
                 }
             }else{
                 temp+= arr[i]
             }
             
         }else{
             if(reg.test(arr[i])){
                 let dot = arr[i].toUpperCase().charCodeAt(0);
                 if(dot == 'A'.charCodeAt(0)){
                     temp+='Z'
                 }else{
                     let res = String.fromCharCode(dot - 1)
                     temp+=res
                 }
             }else if(reg1.test(arr[i])){
                 let dot = arr[i].toLowerCase().charCodeAt(0);
                  if(dot == 'a'.charCodeAt(0)){
                     temp+='z'
                 }else{
                     let res = String.fromCharCode(dot - 1)
                     temp+=res
                 }
             }else if(reg2.test(arr[i])){
                 if(arr[i] == '0'){
                      temp+='9'
                 }else{
                    let res = parseInt(arr[i]) - 1;
                     temp+=res.toString()
                 }
             }else{
                 temp+= arr[i]
             }
         }
     }
    console.log(temp)
}
    let i = 0;
while(line = readline()){
    getRes(line,i % 2 == 0)
    i++
}