View Compilation Error

0_0_37904176_10305.cpp
0_0_37904176_10305.cpp(3) : error C4430: 缺少类型说明符 - 假定为 int。注意:  C++ 不支持默认 int
0_0_37904176_10305.cpp(3) : error C2146: 语法错误: 缺少“;”(在标识符“INF64”的前面)
0_0_37904176_10305.cpp(5) : error C3861: “acos”:  找不到标识符
0_0_37904176_10305.cpp(49) : error C3861: “fabs”:  找不到标识符
0_0_37904176_10305.cpp(61) : error C3861: “sqrt”:  找不到标识符
0_0_37904176_10305.cpp(64) : error C3861: “fabs”:  找不到标识符
0_0_37904176_10305.cpp(103) : error C3861: “scanf”:  找不到标识符
0_0_37904176_10305.cpp(106) : error C3861: “scanf”:  找不到标识符
0_0_37904176_10305.cpp(109) : error C3861: “printf”:  找不到标识符