C++ (Cpp) KeyEvent::GetChar Examples

Programming Language: C++ (Cpp)

Class/Type: KeyEvent

Method/Function: GetChar

Examples at hotexamples.com: 1

The KeyEvent getChar is a function in C++ that is used to obtain the character value of a pressed key on the keyboard. This function is often used in console applications to prompt a user for input or to respond to key presses.

One example of using KeyEvent getChar is to create a simple interactive menu for a program. Here is a code example:

#include 
#include 

int main() {
  char choice;
  std::cout << "Welcome to my program!" << std::endl;
  std::cout << "Please select an option:" << std::endl;
  std::cout << "1. Option 1" << std::endl;
  std::cout << "2. Option 2" << std::endl;
  std::cout << "3. Option 3" << std::endl;
  
  do {
    choice = _getch();
  } while (choice != '1' && choice != '2' && choice != '3');

  std::cout << "You selected option " << choice << "." << std::endl;

  return 0;
}

In this example, the program displays a simple menu and waits for the user to enter a valid option by pressing the corresponding key. The _getch() function is used to read the key press, and the loop will continue until the user enters a valid option (1, 2, or 3).

The package library for this function is the "conio.h" library, which provides console input/output functions for Windows-based systems.

Another example of using KeyEvent getChar is to create a game that responds to player input. Here is a code example:

#include 
#include 

int main() {
  char move;
  int player_x = 0;
  int player_y = 0;

  std::cout << "Welcome to my game!" << std::endl;
  std::cout << "Use the arrow keys to move." << std::endl;

  do {
    move = _getch();

    switch(move) {
      case 'w':
        player_y--;
        break;
      case 's':
        player_y++;
        break;
      case 'a':
        player_x--;
        break;
      case 'd':
        player_x++;
        break;
    }

    std::cout << "Player position: (" << player_x << ", " << player_y << ")" << std::endl;

  } while (move != 'q');

  std::cout << "Thanks for playing!" << std::endl;

  return 0;
}

In this example, the program simulates a simple game where the player can move around a grid using the arrow keys (up, down, left, and right). The position of the player is stored in two variables (player_x and player_y), and the program updates these variables based on the user's input. The package library for this function is again the "conio.h" library, which provides console input/output functions for Windows-based systems.

C++ (Cpp) KeyEvent::GetChar - 1 examples found. These are the top rated real world C++ (Cpp) examples of KeyEvent::GetChar extracted from open source projects. You can rate examples to help us improve the quality of examples.

Frequently Used Methods

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getChar(30)

consume(30)

getCode(30)

getKey(30)

getActionId(11)

getKeyCode(11)

getFlags(5)

GetKeyCode(4)

getSource(4)

getMetaState(3)

empty(3)

getExtendedKey(3)

getEventTime(3)

getDownTime(3)

getDeviceId(3)

getRepeatCount(3)

getScanCode(3)

getAction(3)

getNativeKeyCode(2)

getCharCode(2)

getCharUtf32(2)

getKeyID(2)

IsControlDown(2)

displayable(1)

IsShiftDown(1)

GetKeyEventType(1)

GetSource(1)

GetType(1)

IsAltDown(1)

getKeyChar(1)

Suppress(1)

IsShiftModifier(1)

event(1)

accept(1)

callback(1)

character(1)

getCharacter(1)

control(1)

default_prevented(1)

GetCharData(1)

GetChar(1)

Example #1

Show file

File: SchemeComponent.cpp Project: BingchengIT/Stop_Watch

  bool SchemeComponent::HandleKeyEvent(const KeyEvent & e)
  {
    bool componentResult = Component::HandleKeyEvent(e);
    stringstream ss;

    ss << "(scheme-component-handle-key-event " << this->GetComponentNum() << " ";
    switch (e.GetType()) {
    case KeyEvent::keyPress:
      ss << "'key-press";
      break;

    case KeyEvent::keyRelease:
      ss << "'key-release";
      break;

    default:
      LOG_ERROR << "Error: Unknown KeyEvent type: " << e.GetType();
      return componentResult;
    }
    ss << " #\\" << e.GetChar();
    ss << ")";

    scheme* sc = NULL;
    pointer result;
    int error;
    bool schemeResult = false;
    error = scheme_interpreter_evaluate_string(ss.str().c_str(), &sc, &result);

    if (error) {
      LOG_ERROR << "Error evaluating string: " << ss.str();
    } else {
      if (sc != NULL) {
        schemeResult = result == sc->T;
      } else {
        LOG_ERROR << "Error: No pointer Scheme interpreter returned;";
      }
    }
    return componentResult || schemeResult;
  }