C++帮助使用 ifstream 的 getline 函数
所以我正在编写一个程序来处理读入和写出文件。我使用 getline() 函数，因为文本文件中的某些行可能包含多个元素。到目前为止，我从来没有遇到过 getline 问题。这就是我得到的。
文本文件如下所示：
John Smith // Client name
1234 Hollow Lane, Chicago, IL // Address
123-45-6789 // SSN
Walmart // Employer
58000 // Income
2 // Number of accounts the client has
1111 // Account Number
2222 // Account Number
代码如下：
ifstream inFile("ClientInfo.txt");
if(inFile.fail())
{
cout << "Problem opening file.";
}
else
{
string name, address, ssn, employer;
double income;
int numOfAccount;
getline(inFile, name);
getline(inFile, address);
// I'll stop here because I know this is where it fails.
当我调试此代码时，我发现 name == "John"，而不是 name == "John Smith"，并且 Address == "Smith" 等等。我做错了什么吗？任何帮助将不胜感激。
So I am writing a program that deals with reading in and writing out to a file. I use the getline() function because some of the lines in the text file may contain multiple elements. I've never had a problem with getline until now. Here's what I got.
The text file looks like this:
John Smith // Client name
1234 Hollow Lane, Chicago, IL // Address
123-45-6789 // SSN
Walmart // Employer
58000 // Income
2 // Number of accounts the client has
1111 // Account Number
2222 // Account Number
And the code like this:
ifstream inFile("ClientInfo.txt");
if(inFile.fail())
{
cout << "Problem opening file.";
}
else
{
string name, address, ssn, employer;
double income;
int numOfAccount;
getline(inFile, name);
getline(inFile, address);
// I'll stop here because I know this is where it fails.
When I debugged this code, I found that name == "John", instead of name == "John Smith", and Address == "Smith" and so on. Am I doing something wrong. Any help would be much appreciated.
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评论（1）
您显示的代码应该适用于该文件。所以一定有什么东西和你想象的不一样。最可能的罪魁祸首是：
inFile >>> name您认为它使用了getline(inFile,name)也许您更改了某些内容并忘记保存或重新编译，或者您正在读取与您想象的不同的文件。
顺便说一句，从您的变量声明来看，您可能计划将
getline()调用与提取运算符调用（如inFile >>> ）混合使用。收入。混合这些需要小心，因为提取运算符会留下getline()可能会读取的尾随空白。 此底部附近有更多信息。The code you show should work on that file. So something must be different than you think. The most likely culprits are:
inFile >> namewhere you think it usesgetline(inFile,name)Perhaps you changed something and forgot to save or recompile or you are reading a a different file than you think.
By the way, from your variable declarations it looks like you may be planning to mix
getline()calls with extraction operator calls likeinFile >> income. Mixing these requires care because the extraction operator leaves behind trailing whitespace thatgetline()might then read. There's more information near the bottom of this.