lec 1

and other things
this is mad confusing

common/arraylist.c

@@ -0,0 +1,109 @@
+// for printf
+#include <stdio.h>
+#include "arraylist.h"
+// stack list
+void ldalistinit(ldaArrayList *l)
+{
+    l->size = 0;
+}
+
+int ldalistlen(ldaArrayList *l)
+{
+    return l->size;
+}
+int ldalistcheck(ldaArrayList *l)
+{
+    if (ldalistlen(l) >= 100)
+        return -1;
+    return 0;
+}
+
+int ldalistpush(ldaArrayList *l, int value)
+{
+    if (ldalistcheck(l) != 0)
+        return -1;
+
+    l->list[l->size++] = value;
+    return 0;
+}
+int ldalistadd(ldaArrayList *l, int at, int value)
+{
+    if (ldalistcheck(l) != 0)
+        return -1;
+
+    int size = ldalistlen(l);
+    if (at > size)
+        return -1;
+    else if (at == size)
+    {
+        return ldalistpush(l, value);
+    }
+    else
+    {
+        for (int i = size; i > at; i--)
+        {
+            l->list[i] = l->list[i - 1];
+        };
+        l->list[at] = value;
+        l->size += 1;
+        return 0;
+    }
+}
+
+int ldalistpop(ldaArrayList *l, int *put_here)
+{
+    if (ldalistlen(l) <= 0)
+        return -1;
+    *put_here = l->list[l->size--];
+    return 0;
+}
+
+int ldalistremove(ldaArrayList *l, int at, int *put_here)
+{
+    if (ldalistlen(l) <= 0)
+        return -1;
+
+    int size = ldalistlen(l);
+    if (at > size)
+        return -1;
+    else if (at == size)
+    {
+        return ldalistpop(l, put_here);
+    }
+    else
+    {
+        *put_here = l->list[at];
+        for (int i = at; i++ > size;)
+        {
+            l->list[i] = l->list[i - 1];
+        };
+        return 0;
+    }
+}
+
+int ldalistlookup(ldaArrayList *l, int at, int *copy_here)
+{
+    if (at > ldalistlen(l))
+        return -1;
+    *copy_here = l->list[at];
+    return 0;
+}
+void ldalistprint(ldaArrayList *l)
+{
+    printf("[");
+    for (int i = 0,
+             cur,
+             _ = ldalistlookup(l, i, &cur) || printf("%d", cur);
+         ++i < ldalistlen(l) && printf(", ");
+         _ = ldalistlookup(l, i, &cur) || printf("%d", cur))
+        ;
+    printf("]");
+};
+
+// int main(int argc, char const *argv[])
+// {
+//     /* code */
+//     return 0;
+// }
+
+

common/arraylist.h

@@ -0,0 +1,24 @@
+// for printf
+// stack list
+
+
+#ifndef COMMON_LDAARRAYLIST_H
+#define COMMON_LDAARRAYLIST_H
+typedef struct LdaArrayList
+{
+    int size;
+    int list[100];
+} ldaArrayList;
+
+void ldalistinit(ldaArrayList *l);
+int ldalistlen(ldaArrayList *l);
+int ldalistcheck(ldaArrayList *l);
+int ldalistpush(ldaArrayList *l, int value);
+int ldalistadd(ldaArrayList *l, int at, int value);
+int ldalistpop(ldaArrayList *l, int *put_here);
+int ldalistremove(ldaArrayList *l, int at, int *put_here);
+
+int ldalistlookup(ldaArrayList *l, int at, int *copy_here);
+
+void ldalistprint(ldaArrayList *l);
+#endif