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View Compilation Error

0_0_20184343_3643.cpp
0_0_20184343_3643.cpp(2) : error C2146: 语法错误: 缺少“;”(在标识符“std”的前面)
0_0_20184343_3643.cpp(2) : error C2873: “nanmespace”: 符号不能用在 using 声明中
0_0_20184343_3643.cpp(2) : error C4430: 缺少类型说明符 - 假定为 int。注意:  C++ 不支持默认 int
0_0_20184343_3643.cpp(2) : error C2365: “std”: 重定义;以前的定义是“命名空间”
0_0_20184343_3643.cpp(5) : error C2065: “cin”: 未声明的标识符
0_0_20184343_3643.cpp(8) : error C2065: “cin”: 未声明的标识符
0_0_20184343_3643.cpp(10) : error C2065: “cin”: 未声明的标识符
0_0_20184343_3643.cpp(12) : error C2065: “cout”: 未声明的标识符
0_0_20184343_3643.cpp(12) : error C2065: “endl”: 未声明的标识符


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