Saturday 15 June 2013

calculator

Posted on 05:44 by Unknown

Calculator Program


Code:
#include 
#include 
#include 
void showcalculator(void);
void showcalculator(){
long double  fact=1;
float a,b,choice,r;
char op;
clrscr();
printf("                                          ");
printf("\n                                        ");
printf("\n                                       ");
printf("\n                                        ");
printf("\n_______________________________________");
printf("\n*                                      *");
printf("\n****************************************");
printf("\n*                                      *");
printf("\n*                                      *");
printf("\n*                                      *");
printf("\n****************************************");
printf("\n*                                      *");
printf("\n*  1    2    3    +     oct     hex    *");
printf("\n*                                      *");
printf("\n*  4    5    6    -     sin     cos    *");
printf("\n*                                      *");
printf("\n*  7    8    9    *     tan      n!    *");
printf("\n*                                      *");
printf("\n*  0    .    =    /     log      x^2   *");
printf("\n*                                      *");
printf("\n*  MC   MR   M+   inv   Deg      Rad   *");
printf("\n*                                      *");
printf("\n****************************************");
printf("\n*______________________________________*");

gotoxy(2,8);
scanf("%f",&a);
gotoxy(2,8);
op=getch();

if(op=='+' || op=='-' || op=='/' || op=='*')
{
gotoxy(2,8);
scanf("%f",&b);
}
switch(op)
{
 case 'f':
 {
 while(a>1)
 {
  fact=fact*a;
  a=a-1;
  }
  gotoxy(2,10);

 printf("%.2Lf",fact);
 }
 break;
  case'h':
 printf("\n%x",(int)a);
 break;
 case'o':
 printf("\n%o",(int)a);
 break;
 case 'q':
 r=sqrt(a);
 printf("\nSquare Root = %.4f",a,r);
 break;
 case 'c':
 a=a*3.141592/180;
 r=cos(a);
 printf("\nCos(%.4f) = %.4f",a,r);
 break;
 case 's':
 a=a*3.141592/180;
 r=sin(a);
 printf("\nSin(%.4f) = %.4f",a,r);
 break;
 case 't':

 a=a*3.141592/180;
 r=tan(a);
 printf("\nTan(%.4f) = %.4f",a,r);
 break;

   case'+':
         {
   r=a+b;
   gotoxy(19,10);
   printf("%.3f" ,r);
   break;
   }
   case'-':
   r=a-b;
   gotoxy(19,10);
   printf("%.3f" ,r);
   break;
   case'*':
   r=a*b;
   gotoxy(19,10);
   printf("%.3f" ,r);
   break;
   case'/':
   r=a/b;
   gotoxy(19,10);
   printf("%.3f" ,r);
   break;
   default:
   printf("Syntax Error");
   break;




}

}

void main(){
 int choice;
 //int a=1;
 while(1)
 {
 showcalculator();
 gotoxy(35,35);
 printf("Prs Enter to EXIT");
 scanf("%c",&choice);
  if (choice=='n')
     {
     // a=0;
     }
   break;
 }
getch();

}
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