Create function fetchBalanceFromBalanceString

src/currentCustomerAccountBalance.c

@@ -1,15 +1,28 @@
 #include "currentCustomerAccountBalance.h"
 
+float fetchBalanceFromBalanceString(char balance_String[MAX_LENGTH]) {
+    float balance = 0;
+    char *token = strtok(balance_String, "="); // separates string to two parts
+    while (token != NULL) {
+        if (atoi(token) != 0) {
+            balance = atof(token); // converts string to float
+            break;
+        }
+        token = strtok(NULL, "=");
+    }
+    return balance;
+}
+
 float getAvailableAccountBalance(int user_id) {
     bool keep_reading = true;
-    float balance = 0;
+    float availableBalance = 0;
 
     char buffer[MAX_LENGTH];
     char stringID[MAX_LENGTH] = "ID=";
     char user_id_as_string[MAX_LENGTH];
     char balance_String[MAX_LENGTH];
 
-    sprintf(user_id_as_string, "%d", user_id);
+    sprintf(user_id_as_string, "%d", user_id); // converts user_id to string
     strcat(stringID, user_id_as_string);
 
     FILE *file = fopen("CustomerData.txt", "r"); 
@@ -25,21 +38,13 @@ float getAvailableAccountBalance(int user_id) {
             fgets(buffer, MAX_LENGTH, file);
             fgets(buffer, MAX_LENGTH, file);
             strcpy(balance_String, buffer);
-
-            char *token = strtok(balance_String, "=");
-            while (token != NULL) {
-                if (atoi(token) != 0) {
-                    balance = atof(token);
-                    break;
-                }
-                token = strtok(NULL, "=");
-            }
+            availableBalance = fetchBalanceFromBalanceString(balance_String);
             keep_reading = false;
         }
 
     }
     fclose(file);
     
-    return balance;
+    return availableBalance;
     
 }