Refactoring: minimize code lines for easy understanding

src/currentCustomerAccountBalance.c

@@ -25,10 +25,9 @@ float readFileAndGetAvailableBalance(FILE *file, char stringID[MAX_LENGTH]) {
             keep_reading = false;
         }
         else if(strstr(buffer, stringID)) {
-            fgets(buffer, MAX_LENGTH, file);
-            fgets(buffer, MAX_LENGTH, file);
-            fgets(buffer, MAX_LENGTH, file);
-            fgets(buffer, MAX_LENGTH, file);
+            for (int i = 0; i < 4; i++) {
+                fgets(buffer, MAX_LENGTH, file);
+            }
             strcpy(balance_String, buffer);
             balance = fetchBalanceFromBalanceString(balance_String);
             keep_reading = false;
@@ -49,7 +48,7 @@ float getAvailableAccountBalance(int user_id) {
 
     FILE *file = fopen("CustomerData.txt", "r"); 
     if(file == 0) {
-        printf("Erro: file cannot be opened!");
+        printf("Error: customer data file cannot be opened!");
         return 0;
     }
     else {