Escolha.c

#include <stdio.h>

int main (void){

  int d = 8;

  switch (d){
  
    case 1:
      c=a+b;
      break;
    case 2:
      c=a-b;
      break;
    case 3:
      c=a*b;
      break;
    case 4:
      c=a/b;
      break;
    default:
      c = d;
  }
  
  printf ("%d", c);
  return 0;
}