字符位移

s[]+' '

字符位移 (ASCII)

/*
 * zerojudge
 * a009. 解碼器
 * C++
 * AC (7ms, 324KB)
*/
#include <bits/stdc++.h>
using namespace std;

int main(){
    int k=-7; //從輸入輸出 J->C 知道差-7
    string s;
    cin >> s;
    for(int i=0;i<s.size();i++){
        char c = s[i]+k;
        cout << c;
    }
    cout << endl;
}