Homework 07: seqit.c

homework07/seqit.c

@@ -16,18 +16,58 @@ void usage(int status) {
 }
 
 List *generate_sequence(ssize_t first, ssize_t increment, ssize_t last) {
-    // TODO
-    return NULL;
+    List* sequence = list_create();
+
+    ssize_t current = first;
+    if (increment > 0) {
+        while (current <= last) {
+            list_append(sequence, (Value){.number = current});
+            current += increment;
+        }
+    } else {
+        while (current >= last) {
+            list_append(sequence, (Value){.number = current});
+            current += increment;
+        }
+    }
+
+    return sequence;
 }
 
 /* Main Execution */
 
 int main(int argc, char *argv[]) {
     // TODO: Parse command line arguments
+    ssize_t first = 1, increment = 1, last = 1; // Set initial values
+
+    switch (argc) {
+        case 2:
+            last = atoll(argv[1]);
+            break;
+        case 3:
+            first = atoll(argv[1]);
+            last = atoll(argv[2]);
+            break;
+        case 4:
+            first = atoll(argv[1]);
+            increment = atoll(argv[2]);
+            last = atoll(argv[3]);
+            break;
+        default:
+            usage(EXIT_FAILURE);
+    }
 
     // TODO: Generate sequence
+    List *sequence = generate_sequence(first, increment, last);
 
     // TODO: Print out sequence
+    while (sequence->size > 0) {
+        Value v = list_pop(sequence, 0);
+        printf("%ld\n", v.number);
+    }
+
+    // Delete the list
+    list_delete(sequence, false);
     return EXIT_SUCCESS;
 }