實作按下 . 要怎麼處理

2020-05-06 06:41:05 +08:00
parent 4bbf187cd2
commit 160f1ebd9f
1 changed files with 9 additions and 0 deletions
--- a/AndroidCalculator/Calculator.swift
+++ b/AndroidCalculator/Calculator.swift
@@ -47,6 +47,15 @@ class Calculator {
        formula.append(formula.popLast()! + text)
      }
      
+    case ".":
+      if formula.last!.firstIndex(of: ".") != nil {
+        return
+      } else if ["+", "-", "×", "÷"].firstIndex(of: formula.last!) != nil {
+        return
+      } else {
+        formula.append(formula.popLast()! + text)
+      }
+      
    default:
      print(formula)
    }