102 lines
1.9 KiB
C
102 lines
1.9 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#define SIZE 100
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int nacitaj_riadok(double* cislo) {
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char riadok[SIZE];
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memset(riadok, 0, SIZE);
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char* r = fgets(riadok, SIZE, stdin);
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if (r == NULL) {
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return 0;
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}
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riadok[strcspn(riadok, "\n")] = '\0';
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if (strlen(riadok) == 0) {
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return 0;
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}
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char* koniec = NULL;
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long cele_cislo = strtol(riadok, &koniec, 10);
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if (koniec == riadok) {
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return -1;
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}
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if (*koniec == '.') {
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double desatinne = strtod(riadok, &koniec);
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if (koniec == riadok) {
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return -1;
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}
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*cislo = desatinne;
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}
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else {
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*cislo = (double)cele_cislo;
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}
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return 1;
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}
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double horner(double* koeficienty, int pocet, double x) {
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double vysledok = 0.0;
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int i = 0;
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for (i = 0; i < pocet; i++) {
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vysledok = vysledok * x+ koeficienty[i];
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}
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return vysledok;
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}
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int main() {
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double h = 0.0;
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double koeficienty[SIZE];
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int pocet = 0;
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memset(koeficienty, 0, SIZE * sizeof(double));
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int stav = nacitaj_riadok(&h);
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if (stav != 1) {
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fprintf(stderr, "Chyba: Nepodarilo sa nacitat hodnotu.\n");
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return 1;
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}
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while (1) {
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if (pocet >= SIZE) {
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fprintf(stderr, "Chyba: Prilis vela koeficientov (max %d).\n", SIZE);
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return 1;
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}
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double koef = 0.0;
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stav = nacitaj_riadok(&koef);
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if (stav == 0) {
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break;
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}
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if (stav == -1) {
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fprintf(stderr, "Chyba: Nepodarilo sa nacitat koeficient c. %d.\n", pocet + 1);
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return 1;
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}
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koeficienty[pocet] = koef;
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pocet += 1;
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}
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if (pocet == 0) {
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fprintf(stderr, "Chyba: Nepodarilo sa nacitat koeficient c. 1.\n");
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return 1;
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}
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double vysledok = horner(koeficienty, pocet, h);
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printf("Vysledok je: %.2f\n", vysledok);
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return 0;
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}
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