Re-output a file with capitalized-first-char sentences

[SamJava]

I have a .txt file of a page from a novel with all lowercased letters. I need to tell the program to capitalize the first char after the delimiter ". " Where am I supposed to implement the toupper function with that delimiter?

  //This program reads an article in a text file, and changes all of the
//first-letter-of-sentence-characters to uppercase after a period and 
//whitespace.
#include <iostream>
#include <fstream>
#include <string>
#include <cctype>//for toupper
using namespace std;

int main()
{
	//Variable needed to read file:
	string input;
	fstream file;
	

	//Open the file:
	fstream dataFile("eBook.txt", ios::in);
	if (!dataFile)
	{
		cout << "Error opening file.\n";
		return 0;
	}
	//Read lines, and toupper the first char right after the ". " delimiters:
	getline(dataFile, input, ". ");//error: no instance of overloaded function "getline"
	                               //matches the argument list
	                               //argument types are:(std::fstream, std::string, int)
	while (!dataFile.fail())
	{
		cout << input << endl;
		getline(dataFile, input);
	}
	
	//Close the file:
	dataFile.close();
	return 0;
}

Note that my biggest problem is capitalizing the first sentence char only, and not the entire sentence string.

[poteto]

This isn't beginners stuff man...
The long but will work way is by:

switch((*str.begin()))
{
  case 'a': (*str.begin()) = 'A'; break;
  case 'b': (*str.begin()) = 'B'; break;
  case 'c': (*str.begin()) = 'C'; break;
  //...
}

Then there is the byte way, where if your letter is less than 91 bytes, its a capitol, and if it is over it, it is undercase. And all you have to do is subtract the undercase by 32 bytes. (more accurate: 65-90 = upper, 97-122 = under). This will look like obfuscation though, with magical random numbers that just seemingly work.

[MiiNiPaa]

getline takes a character, a single character, as delimeter. You are trying to pass a string which is not possible.

What can you do:
1) Separate strings based on '.' delimeter. After that manually check existense of space after it and use toupper if needed.
2) Use one of Boost faculties. Namely Boost::split.