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我正在尝试使用 astringstream来做这样的事情(我简化了我的代码以查明错误):

令牌.h

#include <stdio.h>
#include <vector>
#include <sstream>

using namespace std;

class Token {
public:
   static stringstream ss (stringstream::in | stringstream::out);
   static void set_input_string(std::string str);
};

令牌.cpp

#include "Token.h"

void Token::set_input_string(std::string str)
{
   ss << str;
}

当我尝试编译时,我得到: error C2061: syntax error : identifier 'in'在 Token.h on linestatic stringstream ss (stringstream::in | stringstream::out);和 visual studios 2010 中用红色下划线stringstream::in |

4

2 回答 2

3

您不能在类定义中初始化非整数值。你应该有:

// Token.h
#include <cstdio> // thisis the C++ header
#include <vector>
#include <sstream>

// don't do this, especially not in a header file - function-scope at best
// using namespace std;

class Token {
public:
    static std::stringstream ss; // declare

    // probably want this parameter to be a const-reference
    static void set_input_string(std::string str);
};

和:

// Token.cpp
#include "Token.h"

// define
std::stringstream Token::ss(std::stringstream::in | std::stringstream::out); 

void Token::set_input_string(std::string str)
{
   ss << str;
}
于 2011-01-30T05:48:38.993 回答
1

您不能同时声明和定义成员变量。ss 的定义应该在类声明之外:

class Token {
public:
   static stringstream ss; // declaration
   static void set_input_string(std::string str);
};

stringstream Token::ss (stringstream::in | stringstream::out); // definition in your cpp file
于 2011-01-30T05:55:02.407 回答