#include <stdio.h>

int main(void) {

  float a, b;
  char ch;

  printf("Zapiste matematickou operaci:\n");

  scanf("%f %c %f", &a, &ch, &b);

  switch(ch) {
    case '+': printf("%f + %f = %f\n", a, b, a + b);
      break;
    case '-': printf("%f - %f = %f\n", a, b, a - b);
      break;
    case '*': printf("%f * %f = %f\n", a, b, a * b);
      break;
    case '/': if(b!=0) printf("%f / %f = %f\n\n", a, b, a / b); else printf("MATH ERR: Deleni nulou!\n");
      break;
    default:
      printf("Neplatny vstup!\n\n");
      break;
  }
  return 0;
}