enable inputs

qscr/c/gai/fixedynarr.c

@@ -1,4 +1,3 @@
-
 #include <stdio.h>
 #include <stddef.h>
 #include <stdlib.h>
@@ -10,16 +9,15 @@ struct IntArrayStr{
 };
 
 void read_int_array_str(struct IntArrayStr *in_str) {
-  printf("inputlength:%zu\n", in_str->length);
   for (size_t i = 0; i < in_str->length; i++) {
 	printf("digit:%zu = %d\n", i, in_str->data[i]);
   }
 }
 
 struct IntArrayStr *create_int_array_str(size_t in_capacity) {
-  struct IntArrayStr *mystr = malloc(sizeof(struct IntArrayStr)); /* allocate memory for struct */
+  struct IntArrayStr *mystr = malloc(sizeof(struct IntArrayStr));	//allocate memory for struct
 
-  mystr->data = malloc(sizeof(int) * in_capacity); 	/* make sure the pointer in the struct points to the array */
+  mystr->data = malloc(sizeof(int) * in_capacity);					//make sure the pointer in the struct points to the array
   mystr->length = 0;												//forgot to actually assign a value to the struct
   mystr->capacity = in_capacity;
   
@@ -30,38 +28,34 @@ struct IntArrayStr *create_int_array_str(size_t in_capacity) {
   return mystr;
 }
 
+/* push value to struct, also handle realloc */
 void push_int_array_str(int in_int, struct IntArrayStr *in_str){
-  if (in_str->length == in_str->capacity) {
-    in_str->capacity*=2;
+  if (in_str->length == in_str->capacity) {						//check if already full
+    in_str->capacity*=2;										//if so we should double
 	printf("intarray capacity is now:%zu\n", in_str->capacity);
-	int *temp;
-    temp = realloc(in_str->data, sizeof(int)*in_str->capacity);
-	if(temp == NULL){exit(0);};
-	in_str->data = temp;
-	printf("intarray length is now:%zu\n", in_str->length);
+	int *temp;													//create a temporary pointer 
+    temp = realloc(in_str->data, sizeof(int)*in_str->capacity); //realloc the data into a new bucket
+	if(temp == NULL){exit(0);};									//check if actually valid
+	in_str->data = temp;										//if valid, make sure the pointer in the struct points to the realloced block
   }
   in_str->data[in_str->length] = in_int;
   printf("number:%zu = %d\n", in_str->length, in_str->data[in_str->length]);
-  in_str->length++; //didn't read the flow when transfering and accidentally put this in the if block
+  in_str->length++; //didn't read the flow when transferring and accidentally put this in the if block
+  printf("intarray length is now:%zu\n", in_str->length);
   //also had an off-by-one error because I increased length before doing anything
 }
 
 int main() {
   srand(time(NULL));
-  // change to while loop and take inputs rather than fill with random numbers
   printf("input numbers:\n");
 
-  //int input;
-  size_t length = 10;
-  /* while (input != -1) { */
-  /* 	scanf("%d", &input); */
-  /* 	length++; */
-  /* } */
-
   struct IntArrayStr *myintarraystr = create_int_array_str(2);
 
-  for (size_t i = 0; i < length; i++) {
-	int input = rand() % 10;
+  int input;
+  size_t length = 10;
+  
+  while (input != -1) {
+	scanf("%d", &input);
 	push_int_array_str(input, myintarraystr);
   }