解密蒜头君的诗歌：C++ 实现加密字符串还原算法

#include\u0020\n#include\u0020\nusing\u0020namespace\u0020std;

string\u0020decryptCipher(string\u0020cipher)\u0020{\n\u0020string\u0020s\u0020=\u0020"";\n\u0020for\u0020(int\u0020i\u0020=\u00200;\u0020i\u0020<\u0020cipher.length();\u0020i\u0020+=\u00202)\u0020{\n\u0020\u0020s\u0020+=\u0020cipher[i];\n\u0020}\n\u0020return\u0020s;\n}\n
int\u0020main()\u0020{\n\u0020string\u0020cipher;\n\u0020cout\u0020<<\u0020"Enter\u0020the\u0020encrypted\u0020cipher:\u0020";\n\u0020cin\u0020>>\u0020cipher;\n\u0020string\u0020poem\u0020=\u0020decryptCipher(cipher);\n\u0020cout\u0020<<\u0020"Decrypted\u0020poem:\u0020"\u0020<<\u0020poem\u0020<<\u0020endl;\n\u0020return\u00200;\n}