dir.main added

Home/PL/HW/Stack Calculator/Yar/function.c

@@ -0,0 +1,76 @@
+#include "header.h"
+
+void linked_print(LinkedList *l)
+{
+    while (l != NULL)
+    {
+        printf("%lF\n", l->x);
+        l = l->next;
+    }
+}
+
+LinkedList *add_head(LinkedList *l, double x)
+{
+    if (l == NULL)
+    {
+        l = malloc(sizeof(LinkedList));
+        if (l == NULL)
+            exit(1);
+        l->x = x;
+        l->next = NULL;
+    }
+
+    if (l->x == 0.0)
+    {
+        l->x = x;
+        l->next = NULL;
+        return l;
+    }
+
+    LinkedList *tmp = malloc(sizeof(LinkedList));
+    if (tmp == NULL)
+        exit(1);
+
+    tmp->next = l;
+    tmp->x = x;
+    return tmp;
+}
+
+LinkedList *del_head(LinkedList *l)
+{
+    if (l == NULL)
+        return NULL;
+    else if (l->next == NULL)
+    {
+        free(l);
+        l = NULL;
+        return NULL;
+    }
+    LinkedList *tmp = l->next;
+    free(l);
+    l = NULL;
+    return tmp;
+}
+
+int len(LinkedList *l)
+{
+    int res = 0;
+    while (l != NULL)
+    {
+        res++;
+        l = l->next;
+    }
+    return res;
+}
+
+LinkedList get(LinkedList *l, int n)
+{
+    if (n > len(l))
+        exit(3);
+    int i;
+    for (i = 0; i < n; i++)
+    {
+        l = l->next;
+    }
+    return *l;
+}

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

@@ -0,0 +1,72 @@
+#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;
+}

Home/PL/HW/Stack Calculator/Yar/header.h

@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#define N 5
+
+typedef struct LinkedList
+{
+    double x;
+    struct LinkedList *next;
+} LinkedList;
+
+void linked_print(LinkedList *l);
+LinkedList *add_head(LinkedList *l, double x);
+LinkedList *del_head(LinkedList *l);
+int len(LinkedList *l);
+LinkedList get(LinkedList *l, int n);