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View Compilation Error

0_0_34070292_6727.cpp
0_0_34070292_6727.cpp(4) : error C2146: 语法错误: 缺少“;”(在标识符“acos”的前面)
0_0_34070292_6727.cpp(4) : error C4430: 缺少类型说明符 - 假定为 int。注意:  C++ 不支持默认 int
0_0_34070292_6727.cpp(4) : error C2365: “acos”: 重定义;以前的定义是“函数”


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