aritmeticky-prumer-pole.c

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

#include <assert.h>

double pole10[] = {1,2,3,4,5,90,80,77,60,50};
double pole7[] = {1,2,3,4,5,6,7};
double pole_noinit[5];

#define NELEM(arr) (sizeof arr/sizeof arr[0])

double pole_prumer_arith(double pole[], size_t sz) {
  double suma;
  int i;

  assert(sz>0);//resp. vracet NaN pri sz==0 ?
//for (int i=0/*pouze c99*/, suma=0.0; i<sz; i++) { ... }
  for (i=0, suma=0.0; i<sz; i++) {
      suma += pole[i];
  }
  return suma/sz;
}

double pole_suma(double pole[], size_t sz) {
  double suma;
  int i;

  for (i=0, suma=0.0; i<sz; i++) {
      suma += pole[i];
  }
  return suma;
}

double pole_min(double pole[], size_t sz) {
  double min = pole[0];//minimum, cyklus od 1
  int i=1;

  while (i < sz) {
      if (pole[i] < min) min = pole[i];
      i++;
  }
  return min;
}

double pole_max(double pole[], size_t sz) {
  double max = pole[0];//maximum, cyklus od 1
  int i=1;

  while (i < sz) {
      if (pole[i] > max) max = pole[i];
      i++;
  }
  return max;
}


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

int main(void) {
  double result;
  double pole_noinit_local[5];//"inicializovano" smetim

  pole_vypis(pole7, NELEM(pole7));
  result = pole_prumer_arith(pole7, NELEM(pole7));
  printf("Prumer pole je: %g\n", result);
  printf("Suma   pole je: %g\n", pole_suma(pole7, NELEM(pole7)));
  putchar('\n');


  pole_vypis(pole10, NELEM(pole10));
  result = pole_prumer_arith(pole10, NELEM(pole10));
  printf("Prumer pole je: %g\n", result);
  printf("Suma   pole je: %g\n", pole_suma(pole10, NELEM(pole10)));
  printf("Maximum pole je: %g\n", pole_max(pole10, NELEM(pole10)));
  printf("Minimum pole je: %g\n", pole_min(pole10, NELEM(pole10)));

  pole_vypis(pole_noinit, NELEM(pole_noinit));//staticke inicializovano na 0
  pole_vypis(pole_noinit_local, NELEM(pole_noinit_local));//smeti
  return EXIT_SUCCESS;
}