nacteni-cisla-typu-int.c

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//Povolené knihovny:
#include <stdio.h>
#include <stdlib.h>

#define cti_int(k)\
        (scanf("%i", &(k)), (k))
                   //     ^--- operator carka!

#define cti_int2(s, k)\
        (printf("%s",(s)?(s):"Zadej cele cislo:"),scanf("%i", &(k)), (k))

#define flushget() while(getchar()!='\n')

int main(void) {
int j, k;
int inty[5];
int *pi=inty;
char *s = NULL;

//honza: boze, priklad jak noha, na konci kurzu ZP2, :(
  printf("Zadejte cele cislo: ");
  if ((j = cti_int(k)) == 0) printf("nula\n");//nula hlasi i pri vadnem vstupu!!!
  else printf("%i %i\n", j,k);

//NOTE: pokud je predchozi cti_int() volan s neplatnymi/prebyvajicimi daty!!!
//je treba po scanf() zbytek zahodit!!! treba pomoci fgets()? gets() -- nepouzivat!!!
  flushget();
  j = cti_int2("", k); printf("%d %d\n", j, k);
  j = cti_int2(NULL, inty[0]); printf("%d %d\n", j, inty[0]);
  j = cti_int2(NULL, *pi); printf("%d %d\n", j, inty[0]);

  if (s && *s) { printf("s==NULL\n"); }

//co kdyz int pretece, hlasi scanf neco? ne, scanf() vraci pocet zpracovanych %x
  j = sscanf("12345678901234567890", "%i", &k); printf("scanf()=> %d i=%i\n", j, k);
  
  return EXIT_SUCCESS;
}