station

cv5/a_train.c

@@ -10,7 +10,7 @@ struct car* add_car(struct car* first,const char* target) {
     if(target == NULL){
         return 0;
     }
-    
+    //if list is empty, then add newcar
     if(first == NULL){
         strcpy(newcar->value, target);
         newcar->next = NULL;
@@ -19,9 +19,13 @@ struct car* add_car(struct car* first,const char* target) {
     strcpy(newcar->value,target);
     newcar->next = NULL;    
     struct car *this = first;
+
+    //find the end of linked list
     while(this->next != NULL){
         this = this->next;         
     }
+    
+    //add target in the end
     this->next = newcar;
     return first;  
 }
@@ -43,7 +47,7 @@ struct car* clear_train(struct car* first, const char* target) {
     if(first == NULL){
         return 0;
     } 
-    
+    //if there is only one element in linked list, than check if target and value are the same 
     if(first->next == NULL){
       int result = strcmp(first->value, target);
         if(result == 0){
@@ -55,9 +59,11 @@ struct car* clear_train(struct car* first, const char* target) {
         }
     }
      
+    //check all the elemets in linked list
     struct car* prev = first;
     while(prev->next != NULL){
         int x = strcmp(first->value, target);
+        //if the first element and target are the same
         if(x == 0){
             prev = first->next;
             free(first);
@@ -65,6 +71,7 @@ struct car* clear_train(struct car* first, const char* target) {
             
         }
         x = strcmp(prev->next->value, target);
+        //else check all other elements
         if(x == 0){ 
             struct car* third = prev->next->next;
             free(prev->next);

cv6/a_station.c

@@ -1,4 +1,4 @@
-#include "a_station.h"
+#include "a_station.h"i
 #include <stdlib.h>
 #include <string.h>
 
@@ -43,7 +43,7 @@ void add_target_capacity(struct station* station,const char* target, int capacit
     struct car* start = station->tracks[track];
     while(start != NULL){
         int x = strcmp(start->value, target);
-        //if the "wagon" track is similar to the target, then increment capacity 
+        //if the "wagon" track and the target are the same, then increment capacity 
         if(x == 0){
             start->capacity = start->capacity + capacity;
             return;
@@ -58,9 +58,6 @@ void add_target_capacity(struct station* station,const char* target, int capacit
         new->capacity = capacity;
         new->next = start;
         station->tracks[track] = new;
-        /*if(new->next){
-            return;
-        }*/
     }
     return;   
 
@@ -74,7 +71,7 @@ int get_target_capacity(struct station* station,const char* target){
     struct car* start = station->tracks[track];
     while(start != NULL){
         int x = strcmp(start->value, target);
-        //if the target is similar to "wagon", than get the capacity 
+        //if the "wagon" and the track are the same, than get the capacity 
         if(x == 0){
             return start->capacity;
         }
@@ -97,7 +94,7 @@ int count_targets(struct station* station){
 int count_capacity(struct station* station){
     int capacity = 0;
     for(int i = 0; i < STATION_SIZE; i++){
-        //get one linked list and count there capacity      
+        //get one linked list and count capacity there      
         struct car* this = station->tracks[i];
         if(this != NULL){
             capacity = capacity + this->capacity;