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Author: EmperorMurfy

Swift Practice + Warmups/NW Stock [INPUT ENABLED].swift

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+// Project : NW Stock [INPUT ENABLED]
+// Written by: Mason Z
+// Date: Sept 20, 2024
+// Description: Input enabled version. Coded in Programiz (Xcode has issues with allowing inputs in Console) Modifed Version of Original - NW Stock = New Wave Stock
+
+import Foundation
+
+// variables
+var stock = ["hard drives": 502, "software": 7, "wPhones": 24, "wPens": 700532]
+var exit = 1
+
+// produce inventory at launch - starting screen
+print ("Product          Quantity")
+for (product, quantity) in stock {
+    print ("\(product)      \(quantity)")
+}
+
+print(" ")
+print("loading...")
+print(" ")
+print("welcome to new wave computer systems")
+print(" ")
+
+while (exit == 1) {
+    // menu
+    print("************************************************************")
+    print("1 - Add Product")
+    print("2 - Add a Quantity to an Existing Product")
+    print("3 - Remove a Quantity to an Existing Product")
+    print("4 - Total # of Items in Stock")
+    print("5 - All Items in Stock Report")
+    print("0 - EXIT")
+    print("************************************************************")
+    
+// input, prevent input of non integers w/ error
+   var choice: Int = 0
+   
+   if let c = Int(readLine()!) {
+    choice = c
+   }   
+   else {
+     print(" ")
+     print("ERROR 422: Invalid Input Type - Integers Only.")
+     choice = 9
+   }
+   
+    print("")
+    switch choice {
+        case 0: // exit program
+            print("exiting program...")
+            exit = 0
+            
+        case 1: // add product
+            print("Enter Product Name")
+            let productName: String = readLine() ?? "default"
+            print("Enter the quantity of \(productName)")
+            let productQuantity: Int = Int(readLine()!) ?? 0 
+            
+            if let quantity = stock[productName] { 
+                print("ERROR 403: \(productName) with a quantity of \(quantity) already exists.") 
+            }
+            
+            else { 
+                stock[productName] = productQuantity 
+            }
+            
+            
+        case 2: // add quantity to existing product
+            print("Enter Product Name")
+            let productName: String = readLine() ?? "default"
+            print("Enter amount added")
+            let addedQuantity: Int = Int(readLine()!) ?? 0 
+            
+            if let productQuantity = stock[productName] {
+                stock[productName] = productQuantity + addedQuantity
+            } else {
+                print("ERROR 404: \(productName) doesn't exist.")
+            }
+            
+            
+        case 3: // remove quantity to existing product
+            print("Enter Product Name")
+            let productName: String = readLine() ?? "default"
+            print("Enter amount removed")
+            let removedQuantity: Int = Int(readLine()!) ?? 0 
+            
+            if let productQuantity = stock[productName]{
+                stock[productName] = productQuantity - removedQuantity
+            } else {
+                print("ERROR 404: \(productName) doesn't exist.")
+            }
+            
+            
+        case 4: // Total # of Items in Stock
+            var totalStock = 0
+            
+            for quantity in stock.values {
+                 totalStock+=quantity
+            }
+            
+            print("Total Items in Stock = \(totalStock) ")
+            
+            
+        case 5: // All items in Stock Report
+            print ("Product          Quantity")
+            
+            for (product, quantity) in stock {
+                 print ("\(product)      \(quantity)")
+            }
+            
+            
+        default: // ERROR 422: INVALID INPUT OPTION
+            print("Please select an acceptable choice 1-5 or [0] to exit")
+    }
+    print(" ")
+}