Program Kalkulator Sederhana

/*Program Kalkulator sederhana*/
#include <stdio.h>
#include <conio.h>
main()
{
      int a,b,x,y,z,v;
      int operasi;
      printf("Bilangan 1: ");
      scanf("%d",&a);
      printf("Bilangan 2: ");
      scanf("%d",&b);
      printf("Pilihan Operasi: \n");
      printf("1= +\n2= -\n3= *\n4= /\n");
      printf("\nOperasi: ");
      scanf("%i",&operasi);
      switch (operasi)
      {
             case 1: x=a+b;
                       printf("%d + %d = %d",a,b,x);
                       break;
             case 2: y=a-b;
                       printf("%d - %d = %d",a,b,y);
                       break;
             case 3: z=a*b;
                       printf("%d * %d = %d",a,b,z);
                       break;
             case 4: v=a/b;
                       printf("%d / %d = %d",a,b,v);
                       break;        
      }
      getch();
}