From cfef9bbf8a696153b3c83e16cf9607c36c8a90ef Mon Sep 17 00:00:00 2001
From: lunarised <thunder.james.a@gmail.com>
Date: Fri, 22 Mar 2019 10:57:33 +1300
Subject: [PATCH] CalculatorFinished

---
 Calculator/Calculator.ino | 220 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 220 insertions(+)
 create mode 100644 Calculator/Calculator.ino

diff --git a/Calculator/Calculator.ino b/Calculator/Calculator.ino
new file mode 100644
index 0000000..6dbbbc0
--- /dev/null
+++ b/Calculator/Calculator.ino
@@ -0,0 +1,220 @@
+/*
+ *@author James McKenzie
+ *@lang C89 Based
+ *@contact lunarised@outlook.com
+ */
+void setup() {
+    pinMode(0, OUTPUT);
+  pinMode(1, OUTPUT);
+    pinMode(2, OUTPUT);
+  pinMode(3, OUTPUT);
+    pinMode(4, OUTPUT);
+  pinMode(5, OUTPUT);
+  pinMode(6, OUTPUT);
+  pinMode(7, OUTPUT);
+  pinMode (11, INPUT_PULLUP);
+   pinMode (8, INPUT_PULLUP);
+    pinMode (9, INPUT_PULLUP);
+     pinMode (10, INPUT_PULLUP);
+int  i = 0;
+int j = 0;
+int sum = 0;
+  resetDisplay();
+}
+int i;
+int j;
+int sum;
+int result;
+int error;
+void loop() {
+  int error = 0;
+  i = stateA(i);
+  delay (250);
+  j = stateA(j);
+  delay(250);
+  int operand = stateB();
+   stateC(operand);
+  delay(250);
+  stateD();
+  digitalWrite(1, LOW);
+  delay(1000);
+  digitalWrite(1, HIGH);  
+}
+int stateA(int val){
+  while (digitalRead(11)==HIGH){
+    if (digitalRead(8)==LOW){
+      val = (val + 1)%10;
+      displayDigit(val, 100);
+    }
+        if (digitalRead(9)==LOW){
+      val = (val + 9)%10;
+      displayDigit(val, 100);
+    }
+    displayDigit(val, 100);
+  }
+  return val;
+}
+int stateB(){
+int operand = 0;
+digitalWrite(1, LOW);
+while (operand == 0){
+  if (digitalRead(11) == LOW){
+    operand = 1;
+  }
+    if (digitalRead(10) == LOW){
+    operand = 2;
+  }
+    if (digitalRead(9) == LOW){
+    operand = 3;
+  }
+    if (digitalRead(8) == LOW){
+    operand = 4;
+  }
+}
+digitalWrite(1, HIGH);
+return operand;
+}
+void stateC(int operand){
+if (operand == 1){
+  sum = i + j;
+}
+if (operand == 2){
+  sum = i - j;
+}
+if (operand == 3){
+  sum = i * j;
+}
+if (operand == 4){
+  if (j == 0){
+    error = 1;
+  }
+  else{
+    sum = i / j;
+  }
+}
+}
+void stateD(){
+  if (error == 1){
+          digitalWrite(0, LOW);
+            digitalWrite(1, LOW);
+            digitalWrite(2, LOW);
+            digitalWrite(3, LOW);
+            digitalWrite(4, LOW);
+            delay (5000);
+            error = 0;
+  }
+  else{
+  while (digitalRead(11)==HIGH){
+int   splitSum = sum;
+    while(splitSum >= 9){
+  displayDigit(splitSum%10, 250);
+  splitSum /= 10;
+    }
+    displayDigit(splitSum, 250);
+  }
+  }
+}
+void displayDigit(int inp, int fTime){
+    switch (inp){
+      case 1:
+      digitalWrite(5, LOW);
+      digitalWrite(6, LOW);
+      delay(fTime);
+      resetDisplay();
+      break;
+      case 2:
+      digitalWrite(0, LOW);
+      digitalWrite(1, LOW);
+      digitalWrite(2, LOW);
+      digitalWrite(4, LOW);
+      digitalWrite(5, LOW);
+      delay(fTime);
+      resetDisplay();
+      break;
+      case 3:
+      digitalWrite(0, LOW);
+            digitalWrite(1, LOW);
+            digitalWrite(2, LOW);
+            digitalWrite(5, LOW);
+            digitalWrite(6, LOW);
+      delay(fTime);
+      resetDisplay();
+      break;
+      case 4:
+      
+            digitalWrite(1, LOW);
+            digitalWrite(3, LOW);
+            digitalWrite(5, LOW);
+            digitalWrite(6, LOW);
+            delay(fTime);
+      resetDisplay();
+      break;
+      case 5:
+            digitalWrite(1, LOW);
+      digitalWrite(0, LOW);
+      digitalWrite(2, LOW);
+      digitalWrite(3, LOW);
+      digitalWrite(6, LOW);
+      delay(fTime);
+      resetDisplay();
+      break;
+      case 6:
+            digitalWrite(1, LOW);
+      digitalWrite(0, LOW);
+      digitalWrite(2, LOW);
+      digitalWrite(4, LOW);
+      digitalWrite(3, LOW);
+      digitalWrite(6, LOW);
+      delay(fTime);
+      resetDisplay();
+      break;
+      case 7:
+      digitalWrite(2, LOW);
+      digitalWrite(5, LOW);
+      digitalWrite(6, LOW);
+      delay(fTime);
+      resetDisplay();
+      break;
+      case 8:
+      digitalWrite(2, LOW);
+            digitalWrite(1, LOW);
+      digitalWrite(0, LOW);
+      digitalWrite(4, LOW);
+      digitalWrite(3, LOW);
+      digitalWrite(5, LOW);
+      digitalWrite(6, LOW);
+      delay(fTime);
+      resetDisplay();
+      break;
+      case 9:
+      digitalWrite(2, LOW);
+            digitalWrite(1, LOW);
+      digitalWrite(0, LOW);
+      digitalWrite(3, LOW);
+      digitalWrite(5, LOW);
+      digitalWrite(6, LOW);
+      delay(fTime);
+      resetDisplay();
+      break;
+      case 0:
+      digitalWrite(2, LOW);
+      digitalWrite(0, LOW);
+      digitalWrite(3, LOW);
+      digitalWrite(4, LOW);
+      digitalWrite(5, LOW);
+      digitalWrite(6, LOW);
+      delay(fTime);
+      resetDisplay();
+      break;      
+    }
+  };
+void resetDisplay(){
+  digitalWrite(0, HIGH);
+  digitalWrite(1, HIGH);
+  digitalWrite(2, HIGH);
+  digitalWrite(3, HIGH);
+  digitalWrite(4, HIGH);
+  digitalWrite(5, HIGH);
+  digitalWrite(6, HIGH);
+  digitalWrite(7, HIGH);
+}