我的输入文件中没有读取 C++ 空格？

Question

Input txt file:

Joe Smith
Mary Jones
Hamid Namdar

Desired Output Txt file:

Smith Joe
Jones Mary
Namdar Hamid

Output file I receive:

SmitJoeJonesMaryNamdarHamid

#include <iostream>
#include <string>
#include <fstream>

using namespace std;

int main()
{
	ofstream output;
	ifstream input;
	string firstname, lastname;

	output.open("LastName.txt");
	input.open("FirstName.txt");

	cout << "Processing Data..." << endl;

	input >> firstname >> lastname;

	cout << firstname << lastname << endl;

	output << lastname << firstname;

	cout << lastname << firstname << endl;

	input >> firstname >> lastname;

	cout << firstname << lastname << endl;

	output << lastname << firstname;

	cout << lastname << firstname << endl;

	input >> firstname >> lastname;

	cout << firstname << lastname << endl;

	output << lastname << firstname;

	cout << lastname << firstname << endl;


	input.close();
	output.close();

	cin.get();
	cin.get();

	return 0;

}

我的程序要求名称之间有空格，即使我的文本文档中有空格，也不会读取这些空格。有谁知道我应该怎么做才能读取这些空格？

Answer 1

我猜您希望在输出中看到空格，但您没有得到它们。这使您认为没有读取空格。事实是，当您使用以下内容时，空白区域会被读取但会被丢弃:

input >> firstname >> lastname;

您需要将创建输出的行更改为:

cout << firstname << " " << lastname << endl;
output << lastname << " " << firstname << endl;