Up Key input does not work

[xyzl]

arduino uno up Key input does not work，double setpoint = 76.12; The decimal point cannot be added or subtracted

#define DIN 8
#define CLK 3
#define LOAD 4
#define KEY_Position A1
#define KEY_UP A3
#define KEY_DW A2

#include "LedControl.h"
#define DIN 8 //DIN 12
#define CLK 3 //CLK 10
#define LOAD 4 //LOAD/CS 11

LedControl lc = LedControl(DIN, CLK, LOAD, 1);

long sht_temp;
long a, x, y, z, h;
double setpoint = 76.12;
long digito1, digito2, digito3, digito4, digito5, digito6, digito7, digito8;
int key_mode = 3;
long set_Setpoint;

void max7219_view()
{
sht_temp = setpoint * 100;
printC(sht_temp);
}

void MAX7219_Char()
{
delay(130);
lc.setChar(0, key_mode, ' ', 0); //void clearDisplay ( int * addr )
delay(130);
}

void setup()
{ Serial.begin(9600);
pinMode(KEY_Position, INPUT);
pinMode(KEY_UP, INPUT);
pinMode(KEY_DW, INPUT);

digitalWrite(KEY_Position, HIGH);
digitalWrite(KEY_UP, HIGH);
digitalWrite(KEY_DW, HIGH);

lc.shutdown(0, false);
lc.setIntensity(0, 7);
lc.clearDisplay(0);

delay(500);
}

void loop()
{ if (digitalRead(KEY_Position) == LOW)
{
key_mode ++;
if (key_mode >= 8)
{
key_mode = 3;
}
}

max7219_view();
set_Setpoint = setpoint * 100;

h = (set_Setpoint % 10) ;
z = (set_Setpoint / 10 ) % 10 ;
y = (set_Setpoint / 100 ) % 10 ;
x = (set_Setpoint / 1000 ) % 10 ;
a = (set_Setpoint / 10000 ) % 10 ;

if (!digitalRead(KEY_UP) and key_mode == 3) h += 1;
else if (!digitalRead(KEY_DW) and key_mode == 3) h -= 1;
else if (!digitalRead(KEY_UP) and key_mode == 4) z += 1;
else if (!digitalRead(KEY_DW) and key_mode == 4) z -= 1;
else if (!digitalRead(KEY_UP) and key_mode == 5) y += 1;
else if (!digitalRead(KEY_DW) and key_mode == 5) y -= 1;
else if (!digitalRead(KEY_UP) and key_mode == 6) x += 1;
else if (!digitalRead(KEY_DW) and key_mode == 6) x -= 1;
else if (!digitalRead(KEY_UP) and key_mode == 7) a += 1;
else if (!digitalRead(KEY_DW) and key_mode == 7) a -= 1;
if (h > 9) {
h = 0;
}
if (h < 0) {
h = 0;
}
if (z > 9) {
z = 0;
}
if (z < 0) {
z = 0;
}
if (y > 9) {
y = 0;
}
if (y < 0) {
y = 0;
}
if (x > 9) {
x = 0;
}
if (x < 0) {
x = 0;
}
if (a > 9) {
x = 0;
}
if (a < 0) {
x = 0;
}

long ttt = (a * 10000) + (x * 1000) + (y * 100) + (z * 10) + h;

setpoint = ttt ;
setpoint = setpoint / 100 ;

Serial.println(setpoint);
MAX7219_Char();
}
void printC( long sht_temp)
{

digito4 = (sht_temp % 10) ;
digito5 = (sht_temp / 10 ) % 10 ;
digito6 = (sht_temp / 100 ) % 10 ;
digito7 = (sht_temp / 1000 ) % 10 ;
digito8 = (sht_temp / 10000 ) % 10 ;
bit_dig();
}
void bit_dig()
{
lc.setDigit ( 0 , 7 , (byte) digito8, false);
lc.setDigit ( 0 , 6 , (byte) digito7, false);
lc.setDigit ( 0 , 5 , (byte) digito6, true);
lc.setDigit ( 0 , 4 , (byte) digito5, false);
lc.setDigit ( 0 , 3 , (byte) digito4, false);
}

proteus

[UKHeliBob]

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[anon73444976]

Before all that, you wrote a simple test sketch that just checked that your wiring was correct, and you could read the switches, and print some simple debug messages - does that still work?