0_0_18067860_22574.cpp 0_0_18067860_22574.cpp(26) : error C3861: “__gcd”: 找不到标识符 0_0_18067860_22574.cpp(88) : error C3861: “__gcd”: 找不到标识符 0_0_18067860_22574.cpp(94) : error C3861: “__gcd”: 找不到标识符