Programmable Tic Tac Toe

//Common Cathode Programmable Tic Tac Toe With Arduino Mega
/** Wiring the alphanumeric display individually, you can only draw the characters: {0, X} if interconnect the segments A-F and H,J,K,M respectively. The first character represents A1 and the second one B1.**/
int led_A1=2;//01
int led_B1=3;//X1
int led_A2=4;//02
int led_B2=5;//X2
int led_A3=6;//03
int led_B3=7;//X3
int led_A4=8;//04
int led_B4=9;//X4
int led_A5=10;//05
int led_B5=11;//X5
int led_A6=12;//06
int led_B6=13;//X6
int led_A7=14;//07
int led_B7=15;//X7
int led_A8=16;//08
int led_B8=17;//X8
int led_A9=18;//09
int led_B9=19;//X9
int Sw1=20;
int Sw2=21;
int Sw3=A0;
int Sw4=A1;
int Sw5=A2;
int Sw6=A3;
int Sw7=A4;
int Sw8=A5;
int Sw9=A8;
int SwMode=A9;
int SwClear=A10;
void setup(){
pinMode(led_A1, OUTPUT);
pinMode(led_B1, OUTPUT);
pinMode(led_A2, OUTPUT);
pinMode(led_B2, OUTPUT);
pinMode(led_A3, OUTPUT);
pinMode(led_B3, OUTPUT);
pinMode(led_A4, OUTPUT);
pinMode(led_B4, OUTPUT);
pinMode(led_A5, OUTPUT);
pinMode(led_B5, OUTPUT);
pinMode(led_A6, OUTPUT);
pinMode(led_B6, OUTPUT);
pinMode(led_A7, OUTPUT);
pinMode(led_B7, OUTPUT);
pinMode(led_A8, OUTPUT);
pinMode(led_B8, OUTPUT);
pinMode(led_A9, OUTPUT);
pinMode(led_B9, OUTPUT);
pinMode(Sw1, INPUT);
pinMode(Sw2, INPUT);
pinMode(Sw3, INPUT);
pinMode(Sw4, INPUT);
pinMode(Sw5, INPUT);
pinMode(Sw6, INPUT);
pinMode(Sw7, INPUT);
pinMode(Sw8, INPUT);
pinMode(Sw9, INPUT);
pinMode(SwMode, INPUT);
pinMode(SwClear, INPUT);
}
void loop(){
Sw1 = digitalRead(20);
Sw2 = digitalRead(21);
Sw3 = digitalRead(A0);
Sw4 = digitalRead(A1);
Sw5 = digitalRead(A2);
Sw6 = digitalRead(A3);
Sw7 = digitalRead(A4);
Sw8 = digitalRead(A5);
Sw9 = digitalRead(A8);
SwMode = digitalRead(A9);
SwClear = digitalRead(A10);
if(SwMode==LOW && Sw1==HIGH){
//01
digitalWrite(led_A1, HIGH);
}
if(SwMode==HIGH && Sw1==HIGH){
//X1
digitalWrite(led_B1, HIGH);
}
if(SwMode==LOW && Sw2==HIGH){
//02
digitalWrite(led_A2, HIGH);
}
if(SwMode==HIGH && Sw2==HIGH){
//X2
digitalWrite(led_B2, HIGH);
}
if(SwMode==LOW && Sw3==HIGH){
//03
digitalWrite(led_A3, HIGH);
}
if(SwMode==HIGH && Sw3==HIGH){
//X3
digitalWrite(led_B3, HIGH);
}
if(SwMode==LOW && Sw4==HIGH){
//04
digitalWrite(led_A4, HIGH);
}
if(SwMode==HIGH && Sw4==HIGH){
//X4
digitalWrite(led_B4, HIGH);
}
if(SwMode==LOW && Sw5==HIGH){
//05
digitalWrite(led_A5, HIGH);
}
if(SwMode==HIGH && Sw5==HIGH){
//X5
digitalWrite(led_B5, HIGH);
}
if(SwMode==LOW && Sw6==HIGH){
//06
digitalWrite(led_A6, HIGH);
}
if(SwMode==HIGH && Sw6==HIGH){
//X6
digitalWrite(led_B6, HIGH);
}
if(SwMode==LOW && Sw7==HIGH){
//07
digitalWrite(led_A7, HIGH);
}
if(SwMode==HIGH && Sw7==HIGH){
//X7
digitalWrite(led_B7, HIGH);
}
if(SwMode==LOW && Sw8==HIGH){
//08
digitalWrite(led_A8, HIGH);
}
if(SwMode==HIGH && Sw8==HIGH){
//X8
digitalWrite(led_B8, HIGH);
}
if(SwMode==LOW && Sw9==HIGH){
//09
digitalWrite(led_A9, HIGH);
}
if(SwMode==HIGH && Sw9==HIGH){
//X9
digitalWrite(led_B9, HIGH);
}
if(SwMode==LOW && SwClear==HIGH){
//Clear
digitalWrite(led_A1, LOW);
digitalWrite(led_B1, LOW);
digitalWrite(led_A2, LOW);
digitalWrite(led_B2, LOW);
digitalWrite(led_A3, LOW);
digitalWrite(led_B3, LOW);
digitalWrite(led_A4, LOW);
digitalWrite(led_B4, LOW);
digitalWrite(led_A5, LOW);
digitalWrite(led_B5, LOW);
digitalWrite(led_A6, LOW);
digitalWrite(led_B6, LOW);
digitalWrite(led_A7, LOW);
digitalWrite(led_B7, LOW);
digitalWrite(led_A8, LOW);
digitalWrite(led_B8, LOW);
digitalWrite(led_A9, LOW);
digitalWrite(led_B9, LOW);
}
}