Ifstream

Kode 

#include <iostream>
#include <sstream>

int main()
{
     std::stringstream SS;
     std::string test = "106";
     int aNumber;
     SS << test;
     SS >> aNumber;
}

Kode 

string ReadBankString;
	stringstream RBSS;
	double ReadBankInt = 0;
	// _________________________________
	
// ReadBank
	if(YesNo == "Yes" || YesNo == "yes")
	{
		system("CLS");
		ReadBank.open("Bank.txt");

			// File size function
			long end, begin;
			begin = ReadBank.tellg();
			ReadBank.seekg (0, ios::end);
			end = ReadBank.tellg();
			// __________________


			if(ReadBank.is_open() )
			{
				while(! ReadBank.eof() ) 
				{
					getline(ReadBank, ReadBankString);
				}
				RBSS << ReadBankString;
				RBSS >> regnskab.FilDeposit;
				cout << "Money: " << regnskab.FilDeposit << endl;
				cout << endl << endl << "File size is: " << (end-begin) << ". Bytes" << endl;
				Sleep(5000);
				ReadBank.close();
			}

			else
			{
				cout << "Unable to load Bank.bin file! \nBe sure you have written something to the file, before reading it!" << endl;
				Sleep(3500);
			}
	}

Kode 

#include <iostream>
#include <fstream>

bool ReadIntBinary(int& someInt, const char* fileName)
{
   std::ifstream file(fileName, std::ios::binary);
   if(file && file.read((char *)&someInt, sizeof(someInt)))
      return true;
   return false;
}

bool WriteIntBinary(int& someInt, const char* fileName)
{
   std::ofstream file(fileName, std::ios::binary);
   if(file && file.write((char *)&someInt, sizeof(someInt)))
      return true;
   return false;
}

int main()
{
   int n = -1;
   // This is supposed to fail, the first time
   if(ReadIntBinary(n, "pop.bin"))
      std::cout << "Did Read: " << n << std::endl;
   else
      std::cout << "Failed read" << std::endl;

   // Try to write it, should work
   n = 1234;
   if(WriteIntBinary(n, "pop.bin"))
      std::cout << "Did write: " << n << std::endl;
   else
      std::cout << "Failed write" << std::endl;

   n = 4321;
   // This is supposed to work
   if(ReadIntBinary(n, "pop.bin"))
      std::cout << "Did Read: " << n << std::endl;
   else
      std::cout << "Failed read" << std::endl;
}

Kode 

bool ReadIntBinary(double& someInt, const char* fileName)
{
	ifstream file(fileName, ios::binary);
	if(file && file.read((char *)&someInt, sizeof(someInt)))
		return true;
	return false;
}

double ReadBankInt = -1;
if(ReadIntBinary(ReadBankInt, "Bank.bin") )
			{
				cout << "Did read Int: " << ReadBankInt << endl;

				cout << "Money: " << ReadBankInt << endl;
				cout << endl << endl << "File size is: " << (end-begin) << ". Bytes" << endl;
				Sleep(5000);
				ReadBank.close();
			}

			else
			{
				cout << "Unable to load Bank.bin file! \nBe sure you have written something to the file, before reading it!" << endl;
				Sleep(3500);
			}