equation analyzer

EDN Admin · Jun 26, 2011

i am working on a project using c and gui called equation analyzer i want to make the user enter the limits of x called xmin and xmax but it doesnt feel them this is the code
#include "wingui.h" 
#include "math.h" 
#include <mmsystem.h> 
#include "stdlib.h" 
#include <string.h> 
#define WM_GETTEXT 
//#include <wingui.h> 
//#include <math.h> 
#define bool int 
#define false 0 
#define true 1 
float* x; 
float* y; 
float z; 
float xmax; 
float xmin; 
char eqn[200]; 
char text[128]; 
HWND hFirstEdit; 
HWND hSecondEdit; 
HWND hThirdEdit; 
HWND hFourthEdit; 
HWND hFifthEdit; 
float l,h; 
float k; 
float ymax,ymin; 
float xoff,yoff; 
float xe= 185; 
float ye= 515; //(screenHight -500) 
float px= 900 //(limits i=1100-185) 
;float py= 450 //(limits j=500-50) 
;int xs; 
int ys; 
int xp; 
int yp; 
int xp1; 
int yp1; 
int step= 0.1; 
 
 
 
LRESULT WINAPI WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) 
{ int screenWidth = 1300, screenHeight = 1015; 
static char screenText[128] = "0"; 
static char oldscreenText[128]= "0"; 
switch(message) 
{ 
case WM_CREATE: 
{ 
double M,N,h,k,l; 
char text[128]; 
char input[1000]; 
int screenWidth = GetSystemMetrics(SM_CXSCREEN); 
int screenHeight = GetSystemMetrics(SM_CYSCREEN); 
 
SetWindowLong(hWnd, GWL_STYLE, WS_OVERLAPPEDWINDOW); 
SetWindowPos(hWnd, HWND_TOP, 0, 0, 
screenWidth, screenHeight, SWP_SHOWWINDOW); 
SetWindowText(hWnd, "Equation Analyzer"); 
SetWindowLong(hWnd, GWL_STYLE, WS_OVERLAPPEDWINDOW); 
SetWindowPos(hWnd, HWND_TOP, 0, 0, 
screenWidth, screenHeight, SWP_SHOWWINDOW); 
 
 
HWND hControl; 
HWND hFirstEdit; 
HWND hSecondEdit; 
HWND hThirdEdit; 
HWND hFourthEdit; 
HWND hFifthEdit; 
hControl = CreateWindow("Button","" ,WS_CHILD|WS_VISIBLE,5,690,110,20,hWnd, (HMENU)(UINT_PTR)1,NULL,NULL); 
SetWindowText(hControl,"Draw curve"); 

 
hControl = CreateWindow("Button","" ,WS_CHILD|WS_VISIBLE,130,690,110,20,hWnd, (HMENU)(UINT_PTR)1,NULL,NULL); 
SetWindowText(hControl,"Draw equation"); 
 
hControl = CreateWindow("Button","" ,WS_CHILD|WS_VISIBLE,260,690,110,20,hWnd, (HMENU)(UINT_PTR)1,NULL,NULL); 
SetWindowText(hControl,"Integration"); 

 
hControl = CreateWindow("EDIT","",WS_CHILD|WS_VISIBLE|WS_BORDER|ES_MULTILINE|ES_WANTRETURN,10,550,900,60,hWnd,(HMENU)(UINT_PTR)2,NULL,NULL); 
SetWindowText(hControl,""); 
 
hControl = CreateWindow("STATIC","",WS_CHILD|WS_VISIBLE,5,620,30,20,hWnd,(HMENU)(UINT_PTR)3,NULL,NULL); 
SetWindowText(hControl,"Y = "); 
hFirstEdit = CreateWindow("EDIT","0",WS_CHILD|WS_VISIBLE|WS_BORDER|ES_MULTILINE|ES_WANTRETURN,35,620,900,20,hWnd,(HMENU)(UINT_PTR)2,NULL,NULL); 
GetWindowText(hFirstEdit,text,128); 
h= atof(text); 
 
hControl = CreateWindow("STATIC","",WS_CHILD|WS_VISIBLE,5,650,40,20,hWnd,(HMENU)(UINT_PTR)3,NULL,NULL); 
SetWindowText(hControl,"from"); 
hControl = CreateWindow("EDIT","",WS_CHILD|WS_VISIBLE|WS_BORDER|ES_MULTILINE,50,650,40,20,hWnd,(HMENU)(UINT_PTR)2,NULL,NULL); 
hSecondEdit = CreateWindow("EDIT","0",WS_CHILD|WS_VISIBLE|WS_BORDER|ES_MULTILINE|ES_WANTRETURN,50,650,40,20,hWnd,(HMENU)(UINT_PTR)2,NULL,NULL); 
 
 
 
hControl = CreateWindow("STATIC","",WS_CHILD|WS_VISIBLE,100,650,30,20,hWnd,(HMENU)(UINT_PTR)3,NULL,NULL); 
SetWindowText(hControl,"to"); 
hControl = CreateWindow("EDIT","",WS_CHILD|WS_VISIBLE|WS_BORDER|ES_MULTILINE,125,650,50,20,hWnd,(HMENU)(UINT_PTR)2,NULL,NULL); 
hThirdEdit = CreateWindow("EDIT","0",WS_CHILD|WS_VISIBLE|WS_BORDER|ES_MULTILINE|ES_WANTRETURN,125,650,50,20,hWnd,(HMENU)(UINT_PTR)2,NULL,NULL); 
 
 
 
hControl = CreateWindow("STATIC","",WS_CHILD|WS_VISIBLE,200,650,75,20,hWnd,(HMENU)(UINT_PTR)3,NULL,NULL); 
SetWindowText(hControl,"Resolution"); 
hControl = CreateWindow("EDIT","",WS_CHILD|WS_VISIBLE|WS_BORDER|ES_NUMBER|ES_MULTILINE,290,650,40,20,hWnd,(HMENU)(UINT_PTR)2,NULL,NULL); 
hFourthEdit = CreateWindow("EDIT","0",WS_CHILD|WS_VISIBLE|WS_BORDER|ES_MULTILINE|ES_WANTRETURN,290,650,40,20,hWnd,(HMENU)(UINT_PTR)2,NULL,NULL); 
GetWindowText(hSecondEdit,text,128); 
M= atof(text); 
 
hControl = CreateWindow("STATIC","",WS_CHILD|WS_VISIBLE,350,650,30,20,hWnd,(HMENU)(UINT_PTR)3,NULL,NULL); 
SetWindowText(hControl,"X = "); 
hControl = CreateWindow("EDIT","",WS_CHILD|WS_VISIBLE|WS_BORDER|ES_NUMBER|ES_MULTILINE,400,650,50,20,hWnd,(HMENU)(UINT_PTR)2,NULL,NULL); 
hFifthEdit = CreateWindow("EDIT","0",WS_CHILD|WS_VISIBLE|WS_BORDER|ES_MULTILINE|ES_WANTRETURN,400,650,50,20,hWnd,(HMENU)(UINT_PTR)2,NULL,NULL); 
GetWindowText(hSecondEdit,text,128); 
N= atof(text); 
 
 
} 
break; 
 
case WM_PAINT: 
{ 
 
int n=-10; 
int m=20; 
int i; 
int j; 
HDC hDC = GetDC(hWnd); 
PatBlt(hDC, 30, 20, 1200, 520, BLACKNESS); 
HFONT hFont = WGCreateFont("Calibri", 15, FS_BOLD, 0); 
HFONT hFont1 = WGCreateFont("Calibri", 15, FS_BOLD, 900); 
HPEN hPen = WGCreatePen(RGB(250,0,0), 0.3, PS_SOLID); 
HPEN hPen1 = WGCreatePen(RGB(0,250,0), 2, PS_SOLID); 
HFONT hOldFont = (HFONT)SelectObject(hDC, hFont); 
HPEN hOldPen = (HPEN)SelectObject(hDC, hPen); 
SetBkMode(hDC, TRANSPARENT); 
SetTextColor(hDC, RGB(200, 200, 200)); 
WGPrintf(hDC, 560, 520,"xLable"); 
WGPrintf(hDC, 60, 30,"x 1E+006"); 
WGPrintf(hDC, 1180, 510,"x1"); 
HFONT hOldFont1 = (HFONT)SelectObject(hDC, hFont1); 
SetBkMode(hDC, TRANSPARENT); 
SetTextColor(hDC, RGB(200, 200, 200)); 
WGPrintf(hDC, 80, 300,"y Lable"); 
SelectObject(hDC, hOldFont1); 
for(i= 185; i<=1100; i+=25) 
{ 
MoveToEx(hDC, i, 50, NULL); 
LineTo(hDC, i, 500); 
//d=235; 
if(i<=635) 
{ 
SetBkMode(hDC, TRANSPARENT); 
SetTextColor(hDC, RGB(50, 0, 200)); 
//WGPrintf(hDC, (2*(i-185)+175), 500, "%0.1f", n); 
n+= ((xmax- xmin)/18); 
} 
} 
for(j= 50; j<=500; j+=25) 
{ 
MoveToEx(hDC, 185, j, NULL); 
LineTo(hDC, 1085, j); 
 
if(j!=0) 
{ 
SetBkMode(hDC, TRANSPARENT); 
SetTextColor(hDC, RGB(150, 0, 200)); 
//WGPrintf(hDC, 150, j-8, "%0.1f", m); 
m-=((ymax-ymin)/18); 
} 
} 
SelectObject(hDC, hOldFont); 
SelectObject(hDC, hOldPen); 
DeleteObject(hFont); 
DeleteObject(hPen); 
DeleteObject(hFont1); 
DeleteObject(hPen1); 
ReleaseDC(hWnd, hDC); 
} 
break; 
case WM_CLOSE: 
{ 
if(MessageBox(hWnd, "Do you want to exit the program?", "Equation Analyzer",MB_OKCANCEL|MB_ICONEXCLAMATION)==IDCANCEL) 
{ 
return 0; 
} 
} 
break; 
 
 
case WM_COMMAND: 
{ HPEN hPen1 = WGCreatePen(RGB(0,250,0), 2, PS_SOLID); 
HDC hDC = GetDC(hWnd); 
WORD controlEvent=HIWORD(wParam); 
WORD controlID=LOWORD(wParam); 
HWND hControl=(HWND)lParam; 

 
switch(controlID) 
{ 
 
case 1: 
{ 
if(controlEvent==BN_CLICKED) 
{ 
case WM_PAINT: 
{ float xmin=l; 
float xmax=k; 
int a; 
float b;
 
z= ((xmax-xmin)/step)+1; 
x = new float[z]; 
y = new float[z]; 
 
GetWindowText(hSecondEdit,text,128); 
k= atof(text);
 
GetWindowText(hThirdEdit,text,128); 
l= atof(text);
 
for(a= 0; a<z ; a++) 
{ 
x[a]= xmin +(a*step); 
y[a]= pow(x[a],2); 
 
} 
ymax= 0; 
ymin= 0; 
for(a= 0; a<z; a++) 
{ 
if(y[a]<ymin) 
ymin= y[a]; 
if(y[a]>ymax) 
ymax= y[a]; 
} 
float n= xmin; 
float m= ymax; 
int i; 
int j; 
float d; 
xs= px/(xmax-xmin); 
ys= py/(ymax-ymin); 
xoff= xe-(xmin*xs); 
yoff= ye-(ymin*ys); 
HDC hDC = GetDC(hWnd); 
PatBlt(hDC, 30, 20, 1200, 520, BLACKNESS); 
HFONT hFont = WGCreateFont("Calibri", 15, FS_BOLD, 0); 
HFONT hFont1 = WGCreateFont("Calibri", 15, FS_BOLD, 900); 
HPEN hPen = WGCreatePen(RGB(250,0,0), 0.3, PS_SOLID); 
HPEN hPen1 = WGCreatePen(RGB(0,250,0), 2, PS_SOLID); 
HFONT hOldFont = (HFONT)SelectObject(hDC, hFont); 
HPEN hOldPen = (HPEN)SelectObject(hDC, hPen); 
SetBkMode(hDC, TRANSPARENT); 
SetTextColor(hDC, RGB(200, 200, 200)); 
WGPrintf(hDC, 560, 520,"xLable"); 
WGPrintf(hDC, 60, 30,"x 1E+006"); 
WGPrintf(hDC, 1180, 510,"x1"); 
HFONT hOldFont1 = (HFONT)SelectObject(hDC, hFont1); 
SetBkMode(hDC, TRANSPARENT); 
SetTextColor(hDC, RGB(200, 200, 200)); 
WGPrintf(hDC, 80, 300,"y Lable"); 
SelectObject(hDC, hOldFont1); 
for(a= 0; a<z-1; a++) 
{ 
 
HPEN hOldPen1 = (HPEN)SelectObject(hDC, hPen1); 
xp= (x[a]*xs)+ xoff; 
yp= yoff+(y[a]*ys); 
 
if(yp<=(screenHeight-500)) 
{ 
yp= screenHeight-500; 
} 
if(yp>=(screenHeight-50)) 
{ 
yp= screenHeight-50; 
} 
yp = screenHeight - yp; 
xp1= (x[a+1]*xs)+ xoff; 
yp1= yoff+(y[a+1]*ys); 
if(yp1<=(screenHeight-500)) 
{ 
yp1= screenHeight-500; 
} 
if(yp1>=(screenHeight-50)) 
{ 
yp1= screenHeight-50; 
} 
yp1 = screenHeight - yp1; 
 
MoveToEx(hDC, xp, yp, NULL); 
 
LineTo(hDC, xp1, yp1); 
 
SelectObject(hDC, hOldPen1); 
} 
for(i= 185; i<=1100; i+=25) 
{ 
MoveToEx(hDC, i, 50, NULL); 
LineTo(hDC, i, 500); 
//d=235; 
if(i<=635) 
{ 
SetBkMode(hDC, TRANSPARENT); 
SetTextColor(hDC, RGB(50, 0, 200)); 
WGPrintf(hDC, (2*(i-185)+175), 500, "%0.1f", n); 
n+= ((xmax- xmin)/18); 
} 
} 
for(j= 50; j<=500; j+=25) 
{ 
MoveToEx(hDC, 185, j, NULL); 
LineTo(hDC, 1085, j); 
 
if(j!=0) 
{ 
SetBkMode(hDC, TRANSPARENT); 
SetTextColor(hDC, RGB(150, 0, 200)); 
WGPrintf(hDC, 150, j-8, "%0.1f", m); 
m-=((ymax-ymin)/18); 
} 
} 
SelectObject(hDC, hOldFont); 
SelectObject(hDC, hOldPen); 
DeleteObject(hFont); 
DeleteObject(hPen); 
DeleteObject(hPen1); 
ReleaseDC(hWnd, hDC); 
} 
} 
break; 
 
 
} 
} 
} 
} 
 
 
return WGDefaultWindowProc(hWnd, message, wParam, lParam); 
} 
 
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR, int nCmdShow) 
{ 
return WGCreateMainWindow(hInstance, nCmdShow, WndProc); 
}

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equation analyzer

EDN Admin

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