View Compilation Error

0_0_19377612_11169.c
0_0_19377612_11169.c(4) : error C2061: 语法错误: 标识符“namespace”
0_0_19377612_11169.c(4) : error C2059: 语法错误:“;”
0_0_19377612_11169.c(15) : error C2065: “cin”: 未声明的标识符
0_0_19377612_11169.c(18) : error C2065: “cout”: 未声明的标识符
0_0_19377612_11169.c(18) : error C2065: “endl”: 未声明的标识符