#include <stdio.h>
main(){
       int a, b, c;
       printf("Welcome to Pandyra's box. \n");
       printf("Enter an integer");
       scanf("%d", &a);
       printf("Enter a second integer");
       scanf("%d", &b);
       printf("Enter 0 to add, 1 to subtract, 2 to multiply or 3 to divide. \n");
       switch(c)
       {
                case 0: 
                     c = a + b
                     printf("Answer: %d. \n", c);
                case 1: 
                     c = a - b
                     printf("Answer: %d. \n", c);
                case 2: 
                     c = a * b
                     printf("Answer: %d. \n", c);
                case 3: 
                     c = a / b
                     printf("Answer: %d. \n", c);
                }
                }