INFILE不完全类型错误 [英] Infile incomplete type error

问题描述

我建立一个程序，它的输入文件格式如下：

 标题作者标题作者等等并输出到屏幕标题（作者）标题（作者）等等
 

我目前得到的问题是一个错误：

  

的ifstream infile中具有不完整的类型，不能被定义为

以下是该程序：

 的#include＆LT;＆iostream的GT;
＃包括LT＆;串GT;
＃包括LT＆;＆ifstream的GT;
使用命名空间std;串BOOKTITLE [14];
串BOOKAUTHOR [14];
INT loadData（字符串路径名）;
无效SHOWALL（INT计数器）;诠释的main（）{
INT计数器;
字符串路径;COUT＆所述;＆下;输入要访问的文件的名称：;
CIN＆GT;＆GT;路径;
loadData（路径）;
SHOWALL（柜）;
}
INT loadData（字符串路径名）//从加载数据infile中放入数组中
{
    ifstream的INFILE;
    INT计数器= 0;
    infile.open（路径）; //打开从主用户输入文件
    如果（infile.fail（））
     {
         COUT＆LT;＆LT; 文件打开失败;
         返回0;
     }     而（！infile.eof（））
     {
           INFILE＆GT;＆GT; BOOKTITLE [14]; //获取输入并投入平行阵列
           INFILE＆GT;＆GT; BOOKAUTHOR [14];
           反++;
     }     infile.close;
}无效SHOWALL（INT计数器）//显示标题（作者）格式的输入
{
     COUT＆所述;＆所述; BOOKTITLE＆所述;＆下;（＆所述;＆所述; BOOKAUTHOR＆所述;＆下;）;
}
 

解决方案

文件流定义在头文件＆LT; fstream的方式＆gt; ，你是不是包括它

您应该加上：

 的#include＆LT;＆的fstream GT;
 

I am building a program that takes an input file in this format:

title author

title author

etc

and outputs to screen 

title (author)

title (author)

etc

The Problem I am currently getting is a error:

"ifstream infile has incomplete type and cannot be defined"

Following is the program:

#include <iostream>              
#include <string>
#include <ifstream>
using namespace std; 

string bookTitle [14];
string bookAuthor [14];
int loadData (string pathname);         
void showall (int counter);

int main ()

{
int counter;  
string pathname;

cout<<"Input the name of the file to be accessed: ";
cin>>pathname;
loadData (pathname);
showall (counter);
}


int loadData (string pathname) // Loads data from infile into arrays
{
    ifstream infile; 
    int counter = 0;
    infile.open(pathname); //Opens file from user input in main
    if( infile.fail() )
     {
         cout << "File failed to open";
         return 0;
     }   

     while (!infile.eof())
     {
           infile >> bookTitle [14];  //takes input and puts into parallel arrays
           infile >> bookAuthor [14];
           counter++;
     }

     infile.close;
}

void showall (int counter)        // shows input in title(author) format
{
     cout<<bookTitle<<"("<<bookAuthor<<")";
}

解决方案

File streams are defined in the header <fstream> and you are not including it.

You should add:

#include <fstream>

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