Stuff

#include <stdio.h>main(){       int a, b, c, d;       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", &c);       switch(c)       {                case 0:                      d = a + b;                     printf("Answer: %d. \n", c);                case 1:                      d = a - b;                     printf("Answer: %d. \n", c);                case 2:                      d = a * b;                     printf("Answer: %d. \n", c);                case 3:                      d = a / b;                     printf("Answer: %d. \n", c);                }                }