expected specifier-qualifier-list before std

typedef struct _stResult {
  std::string x;  
  int y;
  struct _st开发者_开发技巧Result *next;  
} strResult;

In this structure i am getting the following error expected specifier-qualifier-list before std. What does this error mean?

Did you forget to #include <string> ?

The compiler obviously doesn't recognize std::string as a type.

std::string is not declared. If you #include <string> at the top, the code compiles.