View Compilation Error

0_0_28811844_1842.c
0_0_28811844_1842.c(4) : error C2061: 语法错误: 标识符“namespace”
0_0_28811844_1842.c(4) : error C2059: 语法错误:“;”
0_0_28811844_1842.c(20) : error C2061: 语法错误: 标识符“check”
0_0_28811844_1842.c(20) : error C2059: 语法错误:“;”
0_0_28811844_1842.c(20) : error C2059: 语法错误:“类型”
0_0_28811844_1842.c(27) : error C2061: 语法错误: 标识符“dfs”
0_0_28811844_1842.c(27) : error C2059: 语法错误:“;”
0_0_28811844_1842.c(27) : error C2059: 语法错误:“类型”