C++ program to make Graphical calculator.

#include<stdio.h>                                                    

#include<conio.h>
#include<dos.h>    
#include<graphics.h>                                            
#include<stdlib.h>                                              
                                                      

Output👆

int initmouse();                                                                                                      

void showptr();

void openwindow();

void closewindow();

void hideptr();

void getmousepos(int *,int*,int*);

void restrictptr(int,int,int,int);

int button,x,y,x1,y1,x2,y2,s;

long double num=0,get,num1=0,result=0;

long double addnum(int);

char opr;

int a,b,r,i1,count,c,sq,newnum=1,d=0;

union REGS i,o;

void main()

{

int driver=DETECT,mode;

int q,p[12];

char input;

char *inpu[4][4]={"1","2","3","4",

"5","6","7","8",

"9","0","+","-" ,

"*","/","clr","="};

char inp[4][4]={'1','2','3','4',

'5','6','7','8',

'9','0','+','-' ,

'*','/','l','='};

initgraph(&driver,&mode,"C:\\Turboc3\\BGI");




if(initmouse()==0)




{




printf("not");




getch();




exit(0);




}




openwindow();

getch();

cleardevice();

setfillstyle(CLOSE_DOT_FILL,200);

bar(260,82,450,320);

bar(430,70,450,320);




setfillstyle(1,GREEN);

bar(236,82,432,300);

setcolor(WHITE);

rectangle(238,50,430,80);

rectangle(237,49,431,81);

rectangle(236,48,432,82);

c=240;




d=100;




s=0;




for(a=0;a<4;a++)




{

c=240;




for(b=0;b<4;b++)

{

setfillstyle(1,YELLOW);

bar(c,d,c+40,d+40);




setcolor(RED);




outtextxy(c+10,d+14,inpu[a][b]);




c+=50;




}




d+=50;




}




showptr();




num=0;




gotoxy(36,5);




printf("%18.1Lf",num);




count=0;




while(!kbhit())

{




outtextxy(20,10,"Press any key to exit..");




i1=0;




c=240;




d=100;




rectangle(0,0,638,478);




getmousepos(&button,&x,&y);




for(a=0;a<4;a++)




{




c=240;




for(b=0;b<4;b++)




{




if((x>=c&&x<=c+40)&&(y>=d&&y<=d+40))




{




if((button&1)==1)




{




while((button&1)==1)




{




setcolor(10);




rectangle(c,d,c+40,d+40);




rectangle(c-1,d-1,c+41,d+41);




rectangle(c-2,d-2,c+42,d+42);




break;




}




delay(100);

setcolor(GREEN);

rectangle(c,d,c+40,d+40);

rectangle(c-1,d-1,c+41,d+41);

rectangle(c-2,d-2,c+42,d+42);

input=inp[a][b];

switch(input)

{

case '1':




get=addnum(1);




gotoxy(36,5);

printf("%18.1Lf",get);




break;




case '2':




get=addnum(2);




gotoxy(36,5);

printf("%18.1Lf",get);

break;




case '3':




get=addnum(3);

gotoxy(36,5);




printf("%18.1Lf",get);

break;

case '4':

get=addnum(4);

gotoxy(36,5);

printf("%18.1Lf",get);

break;

case '5':

get=addnum(5);

gotoxy(36,5);

printf("%18.1Lf",get);

break;

case '6':

get=addnum(6);

gotoxy(36,5);

printf("%18.1Lf",get);

break;

case '7':

get=addnum(7);

gotoxy(36,5);

printf("%18.1Lf",get);

break;

case '8':

get=addnum(8);

gotoxy(36,5);

printf("%18.1Lf",get);

break;

case '9':

get=addnum(9);

gotoxy(36,5);

printf("%18.1Lf",get);

break;

case '0':

get=addnum(0);

gotoxy(36,5);

printf("%18.1Lf",get);

break;

case '+':

num1=num;

num=0;

opr='+';

gotoxy(36,5);

printf("%18.1Lf",num);

break;




case '-':

num1=num;

num=0;

opr='-';

gotoxy(36,5);

printf("%18.1Lf",num);

break;




case '*':

num1=num;

num=0;

opr='*';

gotoxy(36,5);

printf("%18.1Lf",num);

break;




case '/':

num1=num;

num=0;

opr='/';

gotoxy(36,5);

printf("%18.1Lf",num);

break;




case 'l':

num=0;

num1=0;

result=0;

count=0;

gotoxy(36,5);

printf("%18.1Lf",num);

break;




case '=':

switch(opr)

{

case '+':

if(count<1)

{

result=num+num1;

}

else

{

result=result+num;

}

gotoxy(36,5);

printf("%18.1Lf",result);

count+=1;

break;




case '-':




if(count<1)

{

result=num1-num;

}

else

{

result=result-num;

}

gotoxy(36,5);

printf("%18.1Lf",result);

count+=1;

break;

case '*':

if(count<1)

{

result=num1*num;

}

else

{

result=result*num;

}

gotoxy(36,5);

printf("%18.1Lf",result);

count+=1;

break;




case '/':

if(count<1)

{

result=num1/num;

}

else

{

result=result/num;

}

gotoxy(36,5);

printf("%18.1Lf",result);

count+=1;

break;

}

}

}

}




c+=50;

}




d+=50;

}

setcolor(WHITE);

delay(150);

}

getch();

closewindow();

getch();

}

long double addnum(int getnum)

{

num=num*10+getnum;

return(num);

}

int initmouse()

{

i.x.ax=0;

int86(0x33,&i,&o);

return(o.x.ax);

}

void showptr()

{

i.x.ax=1;

int86(0x33,&i,&o);

}

void hideptr()

{

i.x.ax=2;

int86(0x33,&i,&o);

}

void restrictptr(int x1,int y1,int x2,int y2)

{

i.x.ax=7;

o.x.cx=x1;

o.x.dx=x2;

int86(0x33,&i,&o);

i.x.ax=8;

o.x.cx=y1;

o.x.dx=y2;

int86(0x33,&i,&o);

}

void getmousepos(int *button,int *x,int *y)

{

i.x.ax=3;

int86(0x33,&i,&o);

*button=o.x.bx;

*x=o.x.cx;

*y=o.x.dx;

}

void openwindow()

{

int aa,bb,cc,dd,maxx,maxy,i=10;

maxx=getmaxx();

maxy=getmaxy();

rectangle(0,0,maxx,maxy);

aa=250;

bb=400;

cc=260;

for(dd=250;dd<350;dd+=20)

{

setfillstyle(1,2);

bar(dd,bb,cc,bb+10);

cc+=20;

}

aa=250;

bb=400;

cc=260;

while(!kbhit())

{

setcolor(i);

settextstyle(4,HORIZ_DIR,5);

outtextxy(20,20,"Piyush Verma");

setcolor(4);

settextstyle(1,0,4);

outtextxy(200,200,"Calculator");

outtextxy(20,80,"Email : XYZ123@gmail.com");

outtextxy(20,120,"Made By : Piyush Verma");

outtextxy(20,156,"Press any key to continue.......");

settextstyle(1,0,2);

if((aa==350)&&(cc==360))

{

aa=250;

cc=260;

continue;

}

else

{

setcolor(10);

rectangle(aa,bb,cc,bb+10);

rectangle(aa-1,bb-1,cc+1,bb+11);

}

delay(300);

setcolor(BLACK);

rectangle(aa,bb,cc,bb+10);

rectangle(aa-1,bb-1,cc+1,bb+11);

aa+=20;

cc+=20;

}

}

void closewindow()

{

int i,j,k;

cleardevice();

rectangle(0,0,638,478);

k=0;

while(!kbhit())

{

setcolor(k);

settextstyle(1,0,8);

outtextxy(100,150,"THANK YOU");

line(90,250,580,250);

settextstyle(1,0,6.9);

outtextxy(100,270," PIYUSH VERMA");

delay(200);

k++;

}

}