0_0_29598462_2867.cpp 0_0_29598462_2867.cpp(62) : error C3861: “__gcd”: 找不到标识符 0_0_29598462_2867.cpp(66) : error C3861: “__gcd”: 找不到标识符 0_0_29598462_2867.cpp(68) : error C3861: “__gcd”: 找不到标识符 0_0_29598462_2867.cpp(81) : error C3861: “__gcd”: 找不到标识符