1#include<stdio.h>
2 #include<math.h>
3 int main()
4 { int a,b,i;
5 printf(“\n\nenter two no.s : “);
6 scanf(“%d %d”,&a,&b);
7 do
8 {
9 printf(“\nenter 1 for ‘+’ : “);
10 printf(“\nenter 2 for ‘-’ : “);
11 printf(“\nenter 3 for ‘*’ : “);
12 printf(“\nenter 4 for ‘/’ : \n”);
13
14 scanf(“%d”,&i);
15
16 switch(i)
17 {
18 case 1: printf(“\nthe ans. is : %d\n”,a+b);
19 break;
20 case 2: printf(“\nthe ans. is :%d\n”,a-b);
21 break;
22 case 3: printf(“\nthe ans. is :%d\n”,a*b);
23 break;
24 case 4: printf(“\nthe ans. is :%d\n”,a/b);
25 break;
26 default:printf(“\nenter valid option\n”);
27 }
28
29
30 }
31
32 while(i!=0);
33 }
