util.cpp

int getch();
void cls();
int eingabe_Int();


#include <cstdlib>
#include <stdio.h>
#include <iostream>
#include <termios.h>
#include <unistd.h>
#include <windows.h>

using namespace std;

int eingabe_Int(){
        double zahl;
        int temp;
    while(true){
        cin >> zahl;
        if(cin.fail()){
            cin.clear();
            cin.ignore();
            cout << "Eingabe ist kein gültiger Int-wert, bitte wiederholen" << endl;
            continue;
        }
        temp = zahl;
        if(temp != zahl){
            cout << "Eingabe ist kein gültiger Int-wert, bitte wiederholen" << endl;
            continue;
        }
        return zahl;
    }
}

int getch( ) {
  struct termios oldt,
                 newt;
  int            ch;
  tcgetattr( STDIN_FILENO, &oldt );
  newt = oldt;
  newt.c_lflag &= ~( ICANON | ECHO );
  tcsetattr( STDIN_FILENO, TCSANOW, &newt );
  ch = getchar();
  tcsetattr( STDIN_FILENO, TCSANOW, &oldt );
  return ch;
}

void cls()
  {
  HANDLE                     hStdOut;
  CONSOLE_SCREEN_BUFFER_INFO csbi;
  DWORD                      count;
  DWORD                      cellCount;
  COORD                      homeCoords = { 0, 0 };

  hStdOut = GetStdHandle( STD_OUTPUT_HANDLE );
  if (hStdOut == INVALID_HANDLE_VALUE) return;

  /* Get the number of cells in the current buffer */
  if (!GetConsoleScreenBufferInfo( hStdOut, &csbi )) return;
  cellCount = csbi.dwSize.X *csbi.dwSize.Y;

  /* Fill the entire buffer with spaces */
  if (!FillConsoleOutputCharacter(
    hStdOut,
    (TCHAR) ' ',
    cellCount,
    homeCoords,
    &count
    )) return;

  /* Fill the entire buffer with the current colors and attributes */
  if (!FillConsoleOutputAttribute(
    hStdOut,
    csbi.wAttributes,
    cellCount,
    homeCoords,
    &count
    )) return;

  /* Move the cursor home */
  SetConsoleCursorPosition( hStdOut, homeCoords );
  }