C++ 非可视化编程的windows窗口计算器(简易版)
作者：互联网
一个在Dev-C++中写的非可视化编程的windows窗口计算器简易版，其运行效果如下图：
所有框架和单目运算已经做好，+-*/暂未完成，代码还有改进空间......
#include <iostream>
#include <iomanip>
#include <sstream>
#include <string>
#include <cmath>
#include <windows.h>
using namespace std;
struct button {
int x; int y; //坐标
int w; int h; //宽高
const char *szText; //Caption
}
Buttons[] = {
30, 370,0,0,"０",
30, 310,0,0,"１",
90, 310,0,0,"２",
150,310,0,0,"３",
30, 250,0,0,"４",
90, 250,0,0,"５",
150,250,0,0,"６",
30, 190,0,0,"７",
90, 190,0,0,"８",
150,190,0,0,"９",
150,370,0,0," ．",
210,370,0,0,"＋",
210,310,0,0,"－",
210,250,0,0,"×",
210,190,0,0,"÷",
210,130,0,0,"±",
150,130,0,0,"％",
270,310,0,0,"＝",
270,250,0,0,"1/x",
270,190,0,0,"√x",
270,130,0,0,"y^2",
90, 130,0,0,"Ｃ",
30, 130,0,0,"←"
};
#define NUM (sizeof Buttons / sizeof Buttons[0])
string i2str(int i)
{
string s;
stringstream ss;
ss<<i;
s=ss.str();
ss.clear();
return s;
}
int str2i(string s)
{
int i;
stringstream ss;
ss<<s;
ss>>i;
ss.clear();
return i;
}
string d2str(long double d)
{
string s;
stringstream ss;
ss<<setprecision(16)<<d;
s=ss.str();
ss.clear();
return s;
}
long double str2d(string s)
{
long double d;
stringstream ss;
ss<<s;
ss>>setprecision(16)>>d;
ss.clear();
return d;
}
/* This is where all the input to the window goes to */
LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
char buf[1024] = {0};
string tmp;
unsigned int lWord = LOWORD(wParam);
HDC hdc;
PAINTSTRUCT ps;
HWND tHwnd, bHwnd;
static HWND sHwnd1, sHwnd2;
HFONT hFont = (HFONT)GetStockObject(SYSTEM_FIXED_FONT);
switch(Message) {
//在 WM_CREATE 事件中创建所有控件
case WM_CREATE: {
tHwnd = CreateWindow( TEXT("button"),NULL,
WS_CHILD | WS_VISIBLE | BS_GROUPBOX, /*分组框*/
30, 25,
290, 80,
hwnd,(HMENU)31,NULL,NULL);
if (!tHwnd) MessageBox(NULL,"创建分组框失败","Message",MB_OK|MB_ICONERROR);
ShowWindow(tHwnd,SW_SHOW);
//SendMessage(tHwnd, WM_SETFONT, (WPARAM)hFont, lParam); //设置控件字体
UpdateWindow(tHwnd);
sHwnd1 = CreateWindow( TEXT("static"),NULL,
WS_CHILD | WS_VISIBLE ,
36, 40,
278, 22,
hwnd,(HMENU)32,NULL,NULL);
if (!sHwnd1) MessageBox(NULL,"创建文本框失败","Message",MB_OK|MB_ICONERROR);
ShowWindow(sHwnd1,SW_SHOW);
SendMessage(sHwnd1, WM_SETFONT, (WPARAM)hFont, lParam); //设置控件字体
SetWindowLong(sHwnd1,GWL_STYLE,GetWindowLong(sHwnd1,GWL_STYLE) | ES_RIGHT); //设置右对齐
UpdateWindow(sHwnd1);
sHwnd2 = CreateWindow( TEXT("static"),"0",
WS_CHILD | WS_VISIBLE ,
36, 62,
278, 35,
hwnd,(HMENU)33,NULL,NULL);
if (!sHwnd2) MessageBox(NULL,"创建文本框失败","Message",MB_OK|MB_ICONERROR);
ShowWindow(sHwnd2,SW_SHOW);
SetWindowLong(sHwnd2,GWL_STYLE,GetWindowLong(sHwnd2,GWL_STYLE) | ES_RIGHT);
SendMessage(sHwnd2, WM_SETFONT, (WPARAM)hFont, lParam);
UpdateWindow(sHwnd2);
for(int i = 0; i < NUM; i++)
{
Buttons[i].w = 50;
Buttons[i].h = 50;
Buttons[0].w = 110; //0双倍宽
Buttons[17].h = 110; //=双倍高
bHwnd = CreateWindow( TEXT("button"),
Buttons[i].szText,
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
Buttons[i].x, Buttons[i].y,
Buttons[i].w, Buttons[i].h,
hwnd,
(HMENU)i,
((LPCREATESTRUCT) lParam)->hInstance,
NULL);
if (!bHwnd) MessageBox(NULL,"创建命令按钮失败","Message",MB_OK|MB_ICONERROR);
ShowWindow(bHwnd,SW_SHOW);
SendMessage(bHwnd, WM_SETFONT, (WPARAM)hFont, lParam); //设置控件字体
UpdateWindow(bHwnd);
}
break;
}
case WM_COMMAND: {
GetWindowText(sHwnd2, buf, 1024);
tmp = string(buf);
if(lWord>=0 && lWord<=10){
if (lWord==10 && tmp.find(".")!=tmp.npos){
SetWindowText(sHwnd1, TEXT("已有小数点"));
Beep(400,100);
break;
}
tmp = (tmp=="0"&&lWord!=10?"":tmp) + (lWord==10?".":i2str(lWord));
SetWindowText(sHwnd2, tmp.c_str());
}
else switch (lWord){
case 21: //C clear
SetWindowText(sHwnd1, "");
SetWindowText(sHwnd2, "0");
break;
case 22: //BackSpace
tmp = tmp.substr(0, tmp.size()-1);
if (tmp.empty()) tmp = "0";
SetWindowText(sHwnd2, tmp.c_str());
break;
case 15: //±
if (tmp.substr(0, 1) == "-")
tmp.erase(tmp.begin(),tmp.begin()+1);
else
if (tmp!="0") tmp = "-" + tmp;
SetWindowText(sHwnd2, tmp.c_str());
break;
case 16: //%
tmp = d2str(str2d(tmp) * 0.01);
SetWindowText(sHwnd2, tmp.c_str());
break;
case 18: //1/x
if (tmp=="0") {
SetWindowText(sHwnd1, TEXT("除0错"));
Beep(400,100);
break;
}
tmp = d2str(1/str2d(tmp));
SetWindowText(sHwnd2, tmp.c_str());
break;
case 19: //sqrt(x)
if (str2d(tmp)<0) {
SetWindowText(sHwnd1, TEXT("负数不能开平方"));
Beep(400,100);
break;
}
tmp = d2str(sqrt(str2d(tmp)));
SetWindowText(sHwnd2, tmp.c_str());
break;
case 20: //y^2
tmp = d2str(pow(str2d(tmp),2.0));
SetWindowText(sHwnd2, tmp.c_str());
break;
default:
MessageBox(hwnd, i2str(lWord).c_str(), NULL, 0);
}
break;
}
case WM_CLOSE:
if (IDYES==MessageBox(hwnd, "是否真的要退出？", "确认", MB_ICONQUESTION | MB_YESNO))
DestroyWindow(hwnd); //销毁窗口
return 0;
case WM_DESTROY:
ShellAbout(hwnd, "我的计算器", "我的Windows窗口计算器 by Hann Yang, 2021.2.21", NULL);
PostQuitMessage(0);
return 0;
default:
return DefWindowProc(hwnd, Message, wParam, lParam);
}
return 0;
}
/* The 'main' function of Win32 GUI programs: this is where execution starts */
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
int dtWidth, dtHeight;
WNDCLASSEX wc; /* A properties struct of our window */
HWND hwnd; /* A 'HANDLE', hence the H, or a pointer to our window */
RECT rect;
MSG msg; /* A temporary location for all messages */
/* zero out the struct and set the stuff we want to modify */
memset(&wc,0,sizeof(wc));
wc.cbSize = sizeof(WNDCLASSEX);
wc.lpfnWndProc = WndProc; /* This is where we will send messages to */
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
/* White, COLOR_WINDOW is just a #define for a system color, try Ctrl+Clicking it */
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszClassName = "WindowCalculator";
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); /* Load a standard icon */
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION); /* use the name "A" to use the project icon */
if(!RegisterClassEx(&wc)) {
MessageBox(NULL, "Window Registration Failed!","Error!",MB_ICONEXCLAMATION|MB_OK);
return 0;
}
hwnd = GetDesktopWindow(); //取桌面句柄
GetWindowRect(hwnd,&rect); //取桌面范围
dtWidth = rect.right-rect.left; //桌面宽度
dtHeight = rect.bottom-rect.top; //桌面高度
hwnd = CreateWindowEx(WS_EX_CLIENTEDGE,
wc.lpszClassName,
TEXT("我的计算器"),
WS_VISIBLE|WS_OVERLAPPED|WS_SYSMENU|WS_MINIMIZEBOX,
(dtWidth-360)/2, /*窗体居中*/
(dtHeight-480)/2,
360, /* width */
480, /* height */
NULL,NULL,hInstance,NULL);
if(hwnd == NULL) {
MessageBox(NULL, "Window Creation Failed!","Error!",MB_ICONEXCLAMATION|MB_OK);
return 0;
}
while(GetMessage(&msg, NULL, 0, 0) > 0) { /* If no error is received... */
TranslateMessage(&msg); /* Translate key codes to chars if present */
DispatchMessage(&msg); /* Send it to WndProc */
}
return msg.wParam;
}
标签：MB,windows,sHwnd2,C++,Buttons,sHwnd1,简易版,WS,NULL 来源： https://blog.csdn.net/boysoft2002/article/details/113926135