Can't read single line using std::getline

[Jaman3]

I am new to c++ so this might be a simple question. I am trying to read a single line at a time, however when I use std::getline, it reads all of them at once.

My input .txt file is:
3 //Number of cases
Jake
Ronald Skiles Jr
Timmy

I want my output .txt file to read:
Case 0:
Jake
Case 1:
Ronald Skiles Jr
Case 2:
Timmy

However I am getting:
Case 0:
Jake
Ronald Skiles Jr
Timmy
Case 1:
Case 2:

  #include <iostream>
#include <string>

int main()
{
	int i;
	int case_number = 1;
	std::cin >> i;
	for (i; i >= case_number; ++case_number)
	{
		std::cout << "Case: " << case_number - 1 << "\n";
		std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
		std::string name;
		while (std::getline(std::cin, name)) 
		{
			std::cout << name << "\n";
		}
			
			
		//std::string name;
		//std::cin >> name;
		//std::cout << name << "\n";
	}
	return 0;
}

[LB]

Look at line 14 carefully. There is a word before the first parenthesis that you need to understand the implications of.

[Jaman3]

Thank you for responding.
So on line 14, I removed the while statement and now my output is:

Case: 0
Jake
Case: 1
Timmy
Case: 2

It now skips my second line. Any ideas as to why?

#include <iostream>
#include <string>

int main()
{
	int i;
	int case_number = 1;
	std::cin >> i;
	for (i; i >= case_number; ++case_number)
	{
		std::cout << "Case: " << case_number - 1 << "\n";
		std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
		std::string name;
		
		std::getline(std::cin, name);
		std::cout << name << "\n";
	}
	return 0;
}

[LB]

What do you think line 12 is for? You have it coded such that it skips every other line.

[Jaman3]

Hmmm... I'm making some progress. You were right, line 12 was unnecessary. Now however I'm getting an ouput like this:

Case: 0

Case: 1
Jake
Case: 2
Ronald Skiles Jr

I feel like line 14 is the one giving me trouble because I don't really understand it.

#include <iostream>
#include <string>

int main()
{
	int i;
	int case_number = 1;
	std::cin >> i;
	for (i; i >= case_number; ++case_number)
	{
		std::cout << "Case: " << case_number - 1 << "\n";
		std::string name;
		
		std::getline(std::cin, name);
		std::cout << name << "\n";
	}
	return 0;
}

[LB]

Line 12 wasn't unnecessary, it was just in the wrong place. After line 8 there is still a newline character left in the buffer and that gets sucked up as an empty line on the first loop iteration.

[Jaman3]

I finally get it now. Thank you so much for your help. It was a huge help with you not just giving me the answer but guiding me through it.

[48T7M4Gy]

#include <iostream>
#include <string>

int main()
{
	int i;
	int case_number = 1;
	std::cin >> i;
	std::cin.ignore();
	for (i; i >= case_number; ++case_number)
	{
		std::cout << "Case: " << case_number - 1 << "\n";
		std::string name;
		
		std::getline(std::cin, name);
		std::cout << name << "\n";
	}
	return 0;
}