restruct 1

2 semestr/Homework/SC/func.c

@@ -0,0 +1,48 @@
+#include "head.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+void linked_print(Stack *l) // Вывод стека
+{
+  while (l != NULL)
+  {
+    printf("%lF\n", l->x);
+    l = l->next;
+  }
+}
+
+Stack *add_head(Stack *l, double x) // Добавление головы, причем в двух вариациях(если голова изначально есть и если её нет)
+{
+  if (l == NULL)
+  {
+    l = malloc(sizeof(Stack));
+    if (l == NULL)
+      exit(1);
+    l->x = x;
+    l->next = NULL;
+  }
+
+  Stack *tmp = malloc(sizeof(Stack));
+  if (tmp == NULL)
+    exit(1);
+
+  tmp->next = l;
+  tmp->x = x;
+  return tmp;
+}
+
+Stack *del_head(Stack *l)
+{
+  if (l == NULL)
+    return NULL;
+  else if (l->next == NULL)
+  {
+    free(l);
+    l = NULL;
+    return NULL;
+  }
+  Stack *tmp = l->next;
+  free(l);
+  l = NULL;
+  return tmp;
+}

2 semestr/Homework/SC/head.h

@@ -0,0 +1,11 @@
+#define N 5
+
+typedef struct Stack
+{
+  double x;
+  struct Stack *next;
+} Stack;
+
+void linked_print(Stack *l);
+Stack *add_head(Stack *l, double x);
+Stack *del_head(Stack *l);

2 semestr/Homework/SC/main.c

@@ -0,0 +1,53 @@
+#include "head.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+int main(int argc, char *argv[])
+{
+  srand(time(0));
+  Stack *numbers = NULL;
+  char c;
+
+  while ((c = getchar()) != EOF)
+  {
+    if (c == '\n')
+    {
+      break;
+    }
+    else if (c == ' ')
+    {
+      continue;
+    }
+
+    switch (c)
+    {
+    case '0' ... '9':
+      numbers = add_head(numbers, (double)(c - '0'));
+      break;
+
+    case '+':
+    case '-':
+    case '*':
+    case '/':
+
+      double a = numbers->x;
+      numbers = del_head(numbers);
+      double b = numbers->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\n", numbers->x);
+
+  free(numbers);
+  return 0;
+}