0_0_14607012_7446.cpp 0_0_14607012_7446.cpp(24) : error C3861: “__gcd”: 找不到标识符 0_0_14607012_7446.cpp(26) : error C3861: “__gcd”: 找不到标识符 0_0_14607012_7446.cpp(31) : error C3861: “__gcd”: 找不到标识符 0_0_14607012_7446.cpp(66) : error C3861: “__gcd”: 找不到标识符