如果我写这段代码，那么为什么执行控制不会转到第二个while循环? [英] if i write this code then why the execution control is not going to the second while loop?

问题描述

如果我编写此代码，那么为什么执行控制不会转到第二个while循环?以及为什么不读取文件首字母大写?

if i write this code then why the execution control is not going to the second while loop? and why the file capital is not being read?

#include<iostream.h>
#include<fstream.h>
#include<conio.h>

int main()
{
    
    char ch[80];
    ofstream of;
    of.open("E:\\country",ios::out);
    
    of<<"USA";
    of<<"India";
    of.close();
    
    of.open("E:\\capital",ios::out);
    of<<"Washington";
    of<<"Delhi";
    of.close();
    
    ifstream fi;
    fi.open("E:\\country",ios::in);
    
    cout<<"The contents of country are :";
    while(fi)
    {
             fi.getline(ch,50);
             cout<<ch;
    }
    
    fi.close();
    
    cout<<endl;
    
    fi.open("E:\\capital",ios::in);
    cout<<"The contents of capital are :";
    
    while(fi)
    {
             fi.getline(ch,50);
             cout<<ch;
    }
    
    fi.close();
    
    getch();
    return 0;
}

[edit]添加了代码块，HTML编码-OriginalGriff [/edit]
[edit]缺少分号-OriginalGriff [/edit]

[edit]Code block added, HTML encoded - OriginalGriff[/edit]
[edit]Missed a semicolon - OriginalGriff[/edit]

推荐答案

因为它永远不会离开您的第一个循环:

Because it never leaves your first loop:

while(fi)
   {
   ...
   }

永远不会退出，除非更改fi的值-到达文件末尾不会这样做.
更改两个循环以使用

will never exit unless the value of fi is changed - getting to the end of the file does not do that.
Change both your loops to use

while(fi.good())
   {
   ...
   }

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