93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
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#include<string>
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#include <iostream>
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#include "cookies.h"
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void addOrder(string * cookies[], int * size, string new_name) {
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string * s = findOrder(cookies, size, new_name);
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if(s == NULL)
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s = new string(new_name);
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cookies[*size] = s;
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(*size)++;
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}
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int deliverOrder(string * cookies[], int * size, string name) {
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string * s = findOrder(cookies, size, name);
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if(s == NULL)
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return 0;
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// interesting note, temp_cookies gets allocatied on the stack and (see
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// note above return) ...
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string * temp_cookies [MAXIMUM_SIZE] = {};
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int removes = 0;
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int temp_pos = 0;
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for(int i = 0; i < *size; i++) {
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if(cookies[i] == s) {
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// pass
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removes += 1;
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}
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else {
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temp_cookies[temp_pos] = cookies[i];
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temp_pos++;
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}
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}
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// copy from the tmp buffer into the original passed-by-pointer array
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for(int i = 0; i < temp_pos; i++) {
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cookies[i] = temp_cookies[i];
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}
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*size = temp_pos;
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// this removes the memory newed above (in addOrder) from the HEAP
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delete s;
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// ... temp_cookies (along with removes and temp_pos) gets cleaned up at
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// this point ... Stack stack stack
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return removes;
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}
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bool modifyOrder(string * cookies[], int * size, string original_name, string new_name) {
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string * s = findOrder(cookies, size, original_name);
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if(s == NULL)
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return false;
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*s = new_name;
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return true;
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}
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string displayOrders(string * cookies[], int * size) {
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string r;
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for(int i=0; i < *size; i++) {
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r += *cookies[i];
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if(i < *size - 1)
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r += ", ";
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}
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return r;
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}
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string * findOrder(string * cookies[], int * size, string name) {
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string * r = NULL;
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for(int i=0; i<*size; i++) {
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if(*cookies[i] == name) {
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r = cookies[i];
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break;
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}
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}
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return r;
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}
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void clean_up(string * cookies[], int * size) {
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string * deletable_cookies [MAXIMUM_SIZE] = {};
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int del_size = 0;
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for(int i = 0; i < *size; i++) {
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if(!findOrder(deletable_cookies, &del_size, *cookies[i])) {
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deletable_cookies[del_size] = cookies[i];
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del_size++;
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}
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}
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for(int i = 0; i < del_size; i++)
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delete deletable_cookies[i];
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}
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