用c语言编写个计算器《要有界面，能加减乘除即可》

-----这个很简单-------
#include "stdio.h"
#include "windows.h"
void main(int argc,char **argv)
{
HWND hwnd=FindWindow(NULL,argv[0]);
ShowWindow(hwnd,0);
system("calc");

}
--------开个玩笑-------
//以下为我写的代码 不是很好 但愿能帮你

#include <windows.h>
#include <string.h>
static char g_szClassName[] = "MyWindowClass";
static HINSTANCE g_hInst = NULL;
#define OUTPUT 1002
char txt[30]="";
double pre;
double beh;
char yun;
double toNumber()
{
char *p=txt;
double temp=0;
double i=0.1;
while(*p!='.' && *p)
{
temp *=10;
temp += *p-'0';
p++;
}
p++;
while(*p)
{
temp += (*p-'0')*i;
i *= 0.1;
p++;
}
return temp;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
int i,j;
char *s[16]={"7","8","9","+",
"4","5","6","-",
"1","2","3","*",
"0",".","=","/"};
switch(Message)
{
case WM_CREATE:
CreateWindow("EDIT", "", WS_CHILD | WS_VISIBLE|ES_RIGHT, 0,0,190,25, hwnd, (HMENU)OUTPUT, g_hInst, NULL);
for(i=0;i<4;i++)
for(j=0;j<4;j++)
CreateWindow("BUTTON",s[i+j*4],WS_CHILD | WS_VISIBLE,i*50, (j+1)*25, 50,25,hwnd, (HMENU)(i+j*4), g_hInst, NULL);
break;
case WM_SETFOCUS:
SetFocus(GetDlgItem(hwnd, OUTPUT));
break;
break;
case WM_COMMAND:
switch(LOWORD(wParam))
{
case 0:case 1:case 2:case 4:case 5:case 6:case 8:case 9:case 10:case 12:case 13:
strcat(txt,s[LOWORD(wParam)]);
SendDlgItemMessage(hwnd,OUTPUT, WM_SETTEXT,NULL, (long)txt);
break;
case 3:case 7:case 11:case 15:
pre=toNumber();
txt[0]=0;
strcat(txt,s[LOWORD(wParam)]);
yun=txt[0];
SendDlgItemMessage(hwnd,OUTPUT, WM_SETTEXT,NULL, (long)txt);
txt[0]=0;
break;
case 14:
beh = toNumber();
switch(yun)
{
case '+':
pre = pre + beh;
break;
case '-':
pre = pre - beh;
break;
case '*':
pre = pre * beh;
break;
case '/':
pre = pre / beh;
break;
}
sprintf(txt,"%lf",pre);
SendDlgItemMessage(hwnd,OUTPUT, WM_SETTEXT,NULL, (long)txt);
break;
}
break;
case WM_CLOSE:
DestroyWindow(hwnd);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, Message, wParam, lParam);
}
return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow)
{
WNDCLASSEX WndClass;
HWND hwnd;
MSG Msg;

g_hInst = hInstance;

WndClass.cbSize = sizeof(WNDCLASSEX);
WndClass.style = 0;
WndClass.lpfnWndProc = WndProc;
WndClass.cbClsExtra = 0;
WndClass.cbWndExtra = 0;
WndClass.hInstance = g_hInst;
WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
WndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
WndClass.lpszMenuName = NULL;
WndClass.lpszClassName = g_szClassName;
WndClass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

if(!RegisterClassEx(&WndClass))
{
MessageBox(0, "注册窗口失败", "错误信息",
MB_ICONEXCLAMATION | MB_OK | MB_SYSTEMMODAL);
return 0;
}

hwnd = CreateWindowEx(
WS_EX_CLIENTEDGE,
g_szClassName,
"计算器",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 210, 165,
NULL, NULL, g_hInst, NULL);

if(hwnd == NULL)
{
MessageBox(0, "创建窗口失败", "错误信息",
MB_ICONEXCLAMATION | MB_OK | MB_SYSTEMMODAL);
return 0;
}

ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);

while(GetMessage(&Msg, NULL, 0, 0))
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}
return Msg.wParam;
}本回答被网友采纳

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