obraceni-pole.c

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#include <stdio.h>
#include <stdlib.h>

//#include "zp1.h" // zp_pole_vypis() NELEM()

int pole10[10] = {1,2,3,4,5,6,7};

static
void zp1_pole_vypis(int pole[], size_t sz) {
  int i;
  printf("Pole obsahuje cisla");
  for (i=0; i<sz; i++) {
      printf("%c %d", i?',':':', pole[i]);
  }
  putchar('\n');
}

static
void zp1_pole_swap(int pole[], size_t sz) {
  int i, j, temp, polovina;
  polovina = sz / 2;
  for (i=0, j=sz-1; i<polovina; i++, j--) {
      temp    = pole[i];//prehodime pomoci pomocne promenne
      pole[i] = pole[j];
      pole[j] = temp;
  }
}

#ifndef NELEM
#define NELEM(pole) (sizeof pole/sizeof pole[0])
#endif

int main(void) {

  zp1_pole_vypis(pole10, NELEM(pole10));
  zp1_pole_swap (pole10, NELEM(pole10));
  zp1_pole_vypis(pole10, NELEM(pole10));

  return EXIT_SUCCESS;
}