在“if”中编辑全局变量,并在“else if”中重置回初始值

我刚开始编程Arduino,我正在尝试手动设置时钟。我用一个旋转传感器来选择小时,然后用一个按钮来确认小时,然后用交换来更改分钟。但是,当前,当我更改小时并选择适当的分钟值时,小时值会重置回00。

我使用的是Genuino Uno板,带有Grove旋转传感器、LCD显示屏和按钮,以及基座屏蔽。

我希望有人能澄清我的错误,并提出为什么我的变量在编辑小时和分钟之间重置。

#include <rgb_lcd.h>

rgb_lcd lcd;

const int colorR = 255;
const int colorG = 20;
const int colorB = 147;

const int analogInPin = 0;  // Analog input pin that the rotary sensor is attached to

int sensorValue = 0;        // value read from the rotary sensor
int outputValue = 0;
int button = 2;
int hour = 00;
int minute = 00;
int button_state = 0;
int minute_temp = 0;
int hour_temp = 0;

void setup() {
  // set up the LCD's number of columns and rows:
  Serial.begin(9600);
  lcd.begin(16, 2);
  pinMode(button, INPUT);

  lcd.setRGB(colorR, colorG, colorB);
  Serial.println("HELLO");

}
void loop() {
  int confirm = 0;
  confirm = digitalRead(button);
  if (button_state == 0) {
    // read the analog in value:
    sensorValue = analogRead(analogInPin);
    // map it to the range of the analog out:
    outputValue = map(sensorValue, 0, 1023, 0, 23);
    // change the analog out value:
    lcd.clear();
    lcd.setCursor(0, 0);

    String hour = String(outputValue);
    if (outputValue < 10) {
      hour = ("0" + hour);
    }

    minute_temp = minute;
    String minute = String(minute_temp);
    if (minute_temp < 10) {
      minute = ("0" + minute);
    }

    lcd.print(hour);
    lcd.print(":");
    lcd.print(minute);

    // wait 10 milliseconds before the next loop
    // for the analog-to-digital converter to settle
    // after the last reading:
    delay(10);
    if (confirm == HIGH){
      button_state = 1;
      delay(1000);
    }
  }
  else if (button_state == 1){
    // read the analog in value:
    sensorValue = analogRead(analogInPin);
    // map it to the range of the analog out:
    outputValue = map(sensorValue, 0, 1023, 0, 59);
    // change the analog out value:
    lcd.clear();
    lcd.setCursor(0, 0);

    String minute = String(outputValue);
    if (outputValue < 10) {
      minute = ("0" + minute);
    }

    hour_temp = hour;
    String hour = String(hour_temp);
    if (hour_temp < 10) {
      hour = ("0" + hour);
    }

    lcd.print(hour);
    lcd.print(":");
    lcd.print(minute);

    // wait 10 milliseconds before the next loop
    // for the analog-to-digital converter to settle
    // after the last reading:
    delay(10);
    if (confirm == HIGH){
      button_state = 5;
    }
  }
}

非常感谢。