//加密void HelloWorld::encode(std::string &str) { for(int i = 0; i < str.length(); i++) { int ch = str[i]; ch = ch ^ 1; str[i] = ch; }} //解密void HelloWorld::decode(std::string &str) { for(int i = 0; i < str.length(); i++) { int ch = str[i]; ch = ch ^ 1; str[i] = ch; }}
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