#include <stdio.h>
#include <conio.h>

void main()
{
 clrscr();
 float a=0,b=0,res=0;
 char o;
 int ok;
 printf("Input Operation");
 scanf("%lf%c%lf",&a,&o,&b);
 ok = 1;
 switch(o){
	   case '+' : res = a+b;break;
	   case '-' : res = a-b;break;
	   case '*' : res = a*b;break;
	   case '/' : if (b=0) ok = 2;
			else {
			      res = a/b;break;
			     }
	   default : ok = 0;
	  }
 if (ok == 1){
	      printf("%.2f%c%.2f=%.2f",a,o,b,res);
	     }
   else{
	if (ok == 0)printf("Unknow Operation %c",o);
	  else{
	       puts("Divizion By Zero");
	      }
       }
 getch();
}