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View Compilation Error

0_0_30515195_30085.cpp
0_0_30515195_30085.cpp(5) : error C2065: “doublea”: 未声明的标识符
0_0_30515195_30085.cpp(5) : error C2146: 语法错误: 缺少“;”(在标识符“x1”的前面)
0_0_30515195_30085.cpp(5) : error C2065: “x1”: 未声明的标识符
0_0_30515195_30085.cpp(5) : error C2065: “x2”: 未声明的标识符
0_0_30515195_30085.cpp(5) : error C2065: “y2”: 未声明的标识符
0_0_30515195_30085.cpp(7) : error C2065: “x1”: 未声明的标识符
0_0_30515195_30085.cpp(7) : error C2065: “x2”: 未声明的标识符
0_0_30515195_30085.cpp(7) : error C2065: “y2”: 未声明的标识符
0_0_30515195_30085.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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