Update du3/program.c

du3/program.c

@@ -1,107 +1,68 @@
+#include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
-#include <assert.h>
 
-#define STACK_SIZE 10
+#define LIST_SIZE 100
 
-struct stack{
-    float values[STACK_SIZE];
-    int size;
+struct listok {
+   char nazov[101];
+   float cena;
 };
 
-void push_stack(struct stack *s, float value){
-    if (s->size >= STACK_SIZE){
-        printf("Chyba: zasobnik je plny!\n");
-        exit(1);
-}
-    s->values[s->size] = value;
-    s->size++;
-    }
+void add_listok(struct listok *p, int *n){
+   if (fgets(p[*n].nazov, 101, stdin) == NULL){
+      exit(0);
+   }
 
-float pop_stack(struct stack *s){
-    if (s->size <= 0){
-        printf("Chyba: zasobnik je prazdny!\n");
-        exit(1);
-}
-    s->size--;
-    return s->values[s->size];
-    }
+   p[*n].nazov[strcspn(p[*n].nazov, "\n")] = 0;
 
-void print_stack(struct stack *s){
-    for (int i = 0; i < s->size; i++){
-        printf("%.2f ", s->values[i]);
-        }
-    printf("\n");
-    }
+   if (scanf("%f", &p[*n].cena) != 1){
+      exit(0);
+   }
+
+   getchar();
+   *n = *n + 1;
+}
+
+int compare(struct listok *a, struct listok *b){
+   if (a->cena > b->cena){
+      return 1;
+   }
+   if (a->cena < b->cena){
+      return -1;
+   }
+   return strcmp(a->nazov, b->nazov);
+}
+
+void sort_listok(struct listok *p, int n){
+   for (int i = 0; i < n - 1; i++){
+      for (int j = i + 1; j < n; j++){
+         if (compare(&p[i], &p[j]) > 0){
+            struct listok tmp = p[i];
+            p[i] = p[j];
+            p[j] = tmp;
+         }
+      }
+   }
+}
+
+void print_listok(struct listok *p, int n){
+   for (int i = 0; i < n; i++){
+      printf("%s\n", p[i].nazov);
+      printf("%f\n", p[i].cena);
+   }
+}
 
 int main(){
-    struct stack s;
-    s.size = 0;
+   struct listok p[LIST_SIZE];
+   int n = 0;
 
-    char input[100];
+   while (1){
+      add_listok(p, &n);
+   }
 
-    while (1){
-        if (scanf("%s", input) != 1){
-            printf("Chyba: nepodarilo sa nacitat vstup.\n");
-            return 1;
-            }
+   sort_listok(p, n);
+   print_listok(p, n);
 
-        char *endptr;
-        float value = strtof(input, &endptr);
-
-            if (*endptr == '\0') {
-            push_stack(&s, value);
-            print_stack(&s);
-            } 
-        else if (strcmp(input, "+") == 0){
-            if (s.size < 2){
-                printf("Chyba: malo hodnot v zasobniku!\n");
-                return 1;
-                }
-            float b = pop_stack(&s);
-            float a = pop_stack(&s);
-            push_stack(&s, a + b);
-            print_stack(&s);
-            } 
-        else if (strcmp(input, "-") == 0){
-            if (s.size < 2){
-                printf("Chyba: malo hodnot v zasobniku!\n");
-                return 1;
-                }
-            float b = pop_stack(&s);
-            float a = pop_stack(&s);
-            push_stack(&s, a - b);
-            print_stack(&s);
-            } 
-        else if (strcmp(input, "*") == 0){
-            if (s.size < 2){
-                printf("Chyba: malo hodnot v zasobniku!\n");
-                return 1;
-                }
-            float b = pop_stack(&s);
-            float a = pop_stack(&s);
-            push_stack(&s, a * b);
-            print_stack(&s);
-            } 
-        else if (strcmp(input, "/") == 0){
-            if (s.size < 2){
-                printf("Chyba: malo hodnot v zasobniku!\n");
-                return 1;
-                }
-            float b = pop_stack(&s);
-            float a = pop_stack(&s);
-            if (b == 0){
-                printf("Chyba: delenie nulou!\n");
-                return 1;
-                }
-            push_stack(&s, a / b);
-            print_stack(&s);
-            } 
-        else{
-            printf("Chyba: neplatny vstup '%s'\n", input);
-            return 1;
-            }
-            }
-    return 0;
+   return 0;
 }