reorganization

dos/brmbar.c

@@ -0,0 +1,149 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "dataio.h"
+
+#define EAN_MAXLEN 16
+#define NAME_MAXLEN 64
+#define PERSON_MAXLEN 16
+#define ITEMS_MAXCOUNT 512
+#define PEOPLE_MAXCOUNT 128
+#define BUFSIZE 128
+
+struct item {
+    char ean[EAN_MAXLEN];
+    char name[NAME_MAXLEN];
+    int price;
+};
+
+struct item items[ITEMS_MAXCOUNT];
+char people[PEOPLE_MAXCOUNT][PERSON_MAXLEN];
+
+int items_count;
+int people_count;
+int last_item = -1;
+
+char buf[BUFSIZE];
+
+void fill_items()
+{
+    FILE *f = fopen("items.txt", "r");
+
+    items_count = 0;
+
+    while (fgets(buf, BUFSIZE, f)) {
+        int i = 0;
+        int begin = 0;
+
+        //Initialize the item
+        items[items_count].ean[0] = 0;
+        items[items_count].name[0] = 0;
+        items[items_count].price = 0;
+
+        //Read the item EAN
+        while (i < BUFSIZE) {
+            if (buf[i] == ';') {
+                buf[i] = 0;
+                strcpy(items[items_count].ean, &buf[begin]);
+                buf[i] = ';';
+                begin = i + 1;
+                break;
+            }
+            i++;
+        }
+
+        //Read the item name
+        i = begin;
+        while (i < BUFSIZE) {
+            if (buf[i] == ';') {
+                buf[i] = 0;
+                strcpy(items[items_count].name, &buf[begin]);
+                buf[i] = ';';
+                begin = i+1;
+                break;
+            }
+            i++;
+        }
+
+        //Use scanf to read the item price
+        i = begin;
+        if (i < BUFSIZE) {
+            sscanf(&buf[i], "%d", &items[items_count].price);
+        }
+
+        items_count++;
+    }
+    fclose(f);
+}
+
+void fill_people()
+{
+    FILE *f = fopen("people.txt", "r");
+    people_count = 0;
+    while (fgets(people[people_count], PERSON_MAXLEN , f)) {
+        char *c = strpbrk(people[people_count], " \t\r\n");
+        if (c) *c = 0;
+        people[people_count][PERSON_MAXLEN-1] = 0;
+        ++people_count;
+    }
+    fclose(f);
+}
+
+void read_input()
+{
+    int i, balance;
+    printf("> ");
+    if (!fgets(buf, BUFSIZE, stdin)) return;
+
+    // scan items
+    for (i = 0; i < items_count; ++i) {
+        if (!strncmp(buf, items[i].ean, strlen(items[i].ean)) && strlen(items[i].ean)+1 == strlen(buf)) {
+            if (items[i].price == 30000) {
+                last_item = -2;
+                printf("\n%s\n\n", items[i].name);
+            } else
+            if (items[i].price == 0) {
+                last_item = -1;
+                printf("\n%s\n\n", items[i].name);
+            } else {
+                last_item = i;
+                printf("\n%s    %d Kc\n\n", items[i].name, abs(items[i].price));
+            }
+            return;
+        }
+    }
+
+    // scan people
+    for (i = 0; i < people_count; ++i) {
+        if (!strncmp( buf, people[i], 3 )) {
+            printf("\nMember %s ", people[i]);
+            if (last_item == -1) {
+                balance = modify_credit(people[i], 0);
+                printf("has %d Kc.\n\n", balance);
+            } else
+            if (last_item == -2) {
+                balance = modify_credit(people[i], 0);
+                modify_credit(people[i], -balance);
+                printf("has credit set to 0 Kc.\n\n");
+            } else {
+                balance = modify_credit(people[i], items[last_item].price);
+                printf("has ordered %s for %d Kc and now has %d Kc.\n\n", items[last_item].name, abs(items[last_item].price), balance);
+                last_item = -1;
+            }
+            return;
+        }
+    }
+
+    // error
+    printf("\nUnknown code %s\n", buf);
+}
+
+int main()
+{
+    fill_items();
+    fill_people();
+    for (;;) {
+        read_input();
+    }
+    return 0;
+}