0_0_33866120_30255.cpp 0_0_33866120_30255.cpp(34) : error C3861: “__gcd”: 找不到标识符 0_0_33866120_30255.cpp(44) : error C3861: “__gcd”: 找不到标识符 0_0_33866120_30255.cpp(46) : error C3861: “__gcd”: 找不到标识符