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#include <windows.h>
#include <iostream>
using namespace std;
float output = 0;
float finalout;
float hold;
bool holding = false;
bool alive = true;
int sign = 1;
char textOutput [32];
void addNumber( int input )
{
finalout = output * 10 + input;
sprintf_s (textOutput, "%f", finalout);
}
void calculate(int which)
{
if (which != 0)
sign = which;
hold = output;
if (holding == true)
{
if (sign == 1)
{
output *= hold;
}
if (sign == 2)
{
output /= hold;
}
if (sign == 3)
{
output += hold;
}
if (sign == 4)
{
output -= hold;
}
}
holding = true;
}
//WinAPI Procedure, would like to give credit to zetcode
//http://zetcode.com/tutorials/winapi/ helped a lot.
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow )
{
MSG msg ;
HWND hwnd;
WNDCLASS wc;
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.lpszClassName = TEXT( "Calculator" );
wc.hInstance = hInstance ;
wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
wc.lpszMenuName = NULL;
wc.lpfnWndProc = WndProc;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
RegisterClass(&wc);
hwnd = CreateWindow( wc.lpszClassName, TEXT("Calculator"),
WS_OVERLAPPED | WS_SYSMENU,
100, 100, 155, 225, NULL, NULL, hInstance, NULL);
ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);
while( GetMessage(&msg, NULL, 0, 0)) {
DispatchMessage(&msg);
}
return (int) msg.wParam;
}
LRESULT CALLBACK WndProc( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
//PAINT CONSTRUCT
HDC hDC;
PAINTSTRUCT Ps;
switch(msg)
{
case WM_PAINT:
{
hDC = BeginPaint(hwnd, &Ps);
TextOut(hDC, 10, 10, textOutput, lstrlen(textOutput));
EndPaint(hwnd, &Ps);
break;
}
case WM_CREATE:
{
//BUTTONS!!!
CreateWindow(TEXT("button"), TEXT("1"),
WS_VISIBLE | WS_CHILD ,
10, 50, 25, 25,
hwnd, (HMENU) 1, NULL, NULL);
CreateWindow(TEXT("button"), TEXT("2"),
WS_VISIBLE | WS_CHILD ,
45, 50, 25, 25,
hwnd, (HMENU) 2, NULL, NULL);
//SIGN BUTTONS
CreateWindow(TEXT("button"), TEXT("/"),
WS_VISIBLE | WS_CHILD ,
115, 50, 25, 25,
hwnd, (HMENU) 11, NULL, NULL);
CreateWindow(TEXT("button"), TEXT("="),
WS_VISIBLE | WS_CHILD ,
80, 155, 25, 25,
hwnd, (HMENU) 15, NULL, NULL);
break;
}
case WM_COMMAND:
{
//NUMBER COMMANDS
if (LOWORD (wParam) == 1)
{
addNumber (1);
UpdateWindow (hwnd);
}
else if (LOWORD (wParam) == 2)
{
addNumber (2);
UpdateWindow (hwnd);
}
//CALCULATION COMMANDS
else if (LOWORD (wParam) == 11)
{
calculate (1);
}
else
{
calculate (0);
UpdateWindow (hwnd);
}
break;
}
case WM_DESTROY:
{
PostQuitMessage(0);
return 0;
}
}
addNumber(0);
return DefWindowProc(hwnd, msg, wParam, lParam);
}
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