prog.l_ada/Home/PL/HW/Stack Calculator/Yar/general.c

#include "header.h"
#include <stdio.h>

int main(int argc, char *argv[])
{
    srand(time(0));
    LinkedList *numbers = malloc(sizeof(LinkedList));
    if (numbers == NULL)
        exit(1);

    char c;
    char flag = 'n';

    while ((c = getchar()) != EOF)
    {
        if (c == '\n')
        {
            break;
        }
        else if (c == ' ')
        {
            flag = 's';
            continue;
        }

        switch (c)
        {
        case '0' ... '9':
            if (flag == 's')
            {
                numbers = add_head(numbers, (double)(c - '0'));
                flag = 'n';
            }
            else
            {
                double a = get(numbers, 0).x;
                numbers = del_head(numbers);
                a = a * 10 + c - '0';
                numbers = add_head(numbers, a);
            }
            break;

        case '+':
        case '-':
        case '*':
        case '/':
            if (len(numbers) < 2)
            {
                printf("Invalid expression\n");
                exit(2);
            }

            double a = get(numbers, 0).x;
            numbers = del_head(numbers);
            double b = get(numbers, 0).x;
            numbers = del_head(numbers);

            b = (c == '+') ? b + a : b;
            b = (c == '-') ? b - a : b;
            b = (c == '*') ? b * a : b;
            b = (c == '/') ? b / a : b;

            numbers = add_head(numbers, b);
            break;
        }
    }

    printf("res: %lF", get(numbers, 0).x);

    free(numbers);
    return 0;
}