Question

我得到了这个超级简单的代码我尝试在Linux下编译（第一次在linux下工作）我之前用c ++编程，我理解了header和cpp文件的概念......

Sentence.h

#ifndef SENTENCE_H_
#define SENTENCE_H_

std::vector<std::string> split(char sentence[]);
void printWords(std::vector<std::string> words);

#endif

Sentence.cpp

#include "../include/Sentence.h"
#include <iostream>
#include <sstream>
#include <string>
#include <vector>

std::vector<std::string> split(char sentence[]) {
    string str(sentence);
    string buf; // Have a buffer string
    stringstream ss(str); // Insert the string into a stream

    vector<string> tokens; // Create vector to hold our words

    while (ss >> buf)
        tokens.push_back(buf);

    return tokens;
}

void printWords(std::vector<std::string> words) {
    for (size_t i = 0; i < words.size(); ++i)
           std::cout << words[i] << endl;
}

我收到了一些我无法弄清楚错误的错误......

daniel@daniel-ubuntu-server:~/workspace/HW1$ make
g++ -g -Wall -Weffc++ -c -Linclude -o bin/Sentence.o src/Sentence.cpp
In file included from src/Sentence.cpp:1:0:
src/../include/Sentence.h:4:6: error: ‘vector’ in namespace ‘std’ does not name a template type
 std::vector<std::string> split(char sentence[]);
      ^
src/../include/Sentence.h:5:22: error: variable or field ‘printWords’ declared void
 void printWords(std::vector<std::string> words);
                      ^
src/../include/Sentence.h:5:17: error: ‘vector’ is not a member of ‘std’
 void printWords(std::vector<std::string> words);
                 ^
src/../include/Sentence.h:5:29: error: ‘string’ is not a member of ‘std’
 void printWords(std::vector<std::string> words);
                             ^
src/../include/Sentence.h:5:42: error: ‘words’ was not declared in this scope
 void printWords(std::vector<std::string> words);
                                          ^
makefile:10: recipe for target 'bin/Sentence.o' failed
make: *** [bin/Sentence.o] Error 1

Answer 1

您的标头使用std :: vector类，但矢量类代码从不包含在其中。将#include <vector>添加到头文件中，以便在Sentence.h的其余部分之前加载该类。

这对于可能使用Sentece.h的其他文件也有帮助，因为他们不必自己包含矢量类。

Answer 2

Sentence.h使用std::vector，但不包含<vector>标头。与std::string相同的情况。

标头和cpp文件

2 个答案: