0_0_15322465_29915.cpp 0_0_15322465_29915.cpp(33) : error C3861: “__gcd”: 找不到标识符 0_0_15322465_29915.cpp(52) : error C3861: “__gcd”: 找不到标识符 0_0_15322465_29915.cpp(73) : error C3861: “__gcd”: 找不到标识符