0_0_35885469_4736.cpp 0_0_35885469_4736.cpp(46) : error C3861: “gcd”: 找不到标识符 0_0_35885469_4736.cpp(47) : error C3861: “gcd”: 找不到标识符 0_0_35885469_4736.cpp(48) : error C3861: “gcd”: 找不到标识符