pvjc25/du2/program.c

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

#define LINE_SIZE 100

int read_double(double *num){
    char line[LINE_SIZE];
    if(!fgets(line, LINE_SIZE, stdin)){
        return 0;
    }

    char *endptr;
    *num = strtod(line, &endptr);
    if(endptr == line || (*endptr != '\0' && *endptr != '\n')){
        return 0;
    }
    return 1;
}

int main(){
    double x, coef, result = 0.0;
    int coef_index = 0;

    if(!read_double(&x)){
        printf("Chyba: Nepodarilo sa nacitat hodnotu x.\n");
        return 0;
    }

    while(read_double(&coef)){
        if(coef_index == 0){
            result = coef;
        }else{
            result = result * x + coef;
        }
        coef_index++;
    }

    if(read_status == -1){
        printf("Nepodarilo sa nacitat polynom na %d mieste.\n", coef_index + 1);
        return 0;
    }

    if(coef_index == 0){
        printf("Chyba: Nepodarilo sa nacitat ziadne koeficienty.\n");
        return 0;
    }

    printf("Vysledok je: %.2f\n", round(result * 100) / 100);
    return 0;
}