include string，string不命名一个类型 [英] include string, string doesn't name a type

问题描述

我已经包含字符串，只是在头文件中的struct中调用一个字符串变量。
我得到'字符串不命名一个类型'为字符串原始和目的地城市，尽管调用字符串之前它

  // sortedListClass.h（几行注释）
 #include< string> 
 struct flightRec {
 int flightnumber; 
 string源; // problem＃1 
 string DestinationCity; // problem＃2 
 float cost; 
 flightRec * ptr; 
}; 
 typedef flightRec * nodeptr; 
 #ifndef SORTEDLISTCLASS_H 
 #define SORTEDLISTCLASS_H 
 #include< iostream> 
 #include< cassert> 
  

sortedListClass.h：10：5：错误：
'string'未命名类型

sortedListClass.h：11：5：错误：
'string'不命名类型

$

解决方案

p> std :: string ，除非你用使用指令（你不应该在头）。

I have included string and just after call a string variable in a struct in an header file. I get the 'string doesn't name a type' for string Origin and Destination City, despite calling string just before it

//sortedListClass.h (a few lines of comments)
#include <string>
struct flightRec{
    int flightnumber;
    string Origin; //problem #1
    string DestinationCity; // problem #2
    float cost;
    flightRec* ptr;
};
typedef flightRec* nodeptr;
#ifndef SORTEDLISTCLASS_H
#define SORTEDLISTCLASS_H
#include <iostream>
#include <cassert>

sortedListClass.h:10:5: error: ‘string’ does not name a type

sortedListClass.h:11:5: error: ‘string’ does not name a type

Might I ask what am I doing wrong?

解决方案

It's called std::string unless you put in a using directive (which you shouldn't do in a header).

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