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View Compilation Error

0_0_37107953_24881.cpp
0_0_37107953_24881.cpp(6) : error C2086: “double x”: 重定义
        0_0_37107953_24881.cpp(4) : 参见“x”的声明
0_0_37107953_24881.cpp(6) : error C2086: “double y”: 重定义
        0_0_37107953_24881.cpp(4) : 参见“y”的声明
0_0_37107953_24881.cpp(6) : error C2374: “sum”: 重定义;多次初始化
        0_0_37107953_24881.cpp(4) : 参见“sum”的声明
0_0_37107953_24881.cpp(7) : error C2065: “s”: 未声明的标识符
0_0_37107953_24881.cpp(7) : fatal error C1903: 无法从以前的错误中恢复;正在停止编译


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