Main.cc:3:7: 错误:expected nested-name-specifier before ‘namespase’ using namespase std; ^ Main.cc:3:7: 错误:‘namespase’未声明 Main.cc:3:17: 错误:expected ‘;’ before ‘std’ using namespase std; ^ Main.cc:3:17: 错误:‘std’不是一个类型名 Main.cc: 在函数‘int main()’中: Main.cc:7:5: 错误:‘cout’在此作用域中尚未声明 cout << "Hello,world!"; ^ Main.cc:7:5: 附注:建议的替代: In file included from Main.cc:1:0: /usr/include/c++/4.8.2/iostream:61:18: 附注: ‘std::cout’ extern ostream cout; /// Linked to standard output ^