Stopwatch with Arduino starter kit

1 //function: stopwatch with start/stop(button 1) and reset(button 2)
2//start/pause  button 1 
3//add lap function success!!
4//improve lap function scuuess!!
5  #include<LiquidCrystal.h>
6 LiquidCrystal lcd(12,11,7,6,5,4);
7
8 int ss1  = 0, ss2 = 0;
9 int pss1 = 0;
10 int ms=0,sec =0, minute=0;
11long interval  = 98;
12unsigned long last=0,dur,pre=0,last2=0,dur2;
13 int num_rise=0;
14bool  reset=0,row=0;
15
16void timeNprint(){
17    unsigned long curr = millis();
18    if (curr-pre>interval){
19    pre=curr;
20    ms++;
21      if (ms==10) {sec++;ms=0;}
22      if (sec==60) {sec=0;minute++;}
23    lcd.setCursor(0,0);
24      if (minute<10)  lcd.print("0");
25    lcd.print(minute);
26    lcd.print(":");
27    if (sec<10)  lcd.print("0");
28    lcd.print(sec);
29    lcd.print(":");
30    lcd.print(ms);
31    }
32}
33void printTime(){
34  lcd.setCursor(9,row);
35  row=!row;
36      if  (minute<10) lcd.print("0");
37    lcd.print(minute);
38    lcd.print(":");
39    if (sec<10) lcd.print("0");
40    lcd.print(sec);
41    lcd.print(":");
42    lcd.print(ms);
43  }
44void resetNwelcome(){
45  ms=0;minute=0;sec=0;
46  lcd.setCursor(0,1);
47  lcd.print("XW's Stopwatch");
48  lcd.setCursor(0,0);
49  lcd.print("Welcome to use");
50}
51
52void setup() {
53lcd.begin(16,2);
54pinMode(2,INPUT);
55pinMode(3,INPUT);
56}
57
58void  loop() {
59  num_rise=0;
60  resetNwelcome();
61  ss1=digitalRead(2);
62if (ss1  == HIGH) 
63{
64  num_rise++;
65  last=millis();
66  lcd.clear();
67  while(1)  //stop
68  {
69    switch(num_rise%2)
70    {
71      case 0:   //pause
72      ss2=digitalRead(3);
73      ss1=digitalRead(2);
74      dur=millis()-last;
75      if (ss2==HIGH) {reset=1;break;}
76      else if(ss1==HIGH && dur>300) {
77        num_rise++;
78        last=millis();}
79      break;
80      case 1:   
81      timeNprint();
82      ss1=digitalRead(2);dur=millis()-last;
83      if  (ss1==HIGH &&dur>300) {
84        num_rise++;
85        last=millis();
86        }  
87      break;
88      
89     }
90      ss2=digitalRead(3);
91      dur2=millis()-last2;
92    if(ss2==1 && dur2>300) 
93    {
94      last2=millis();
95      printTime();
96      }
97    if(reset==1) 
98    {reset=0;lcd.clear();row=0;break;}
99   }
100}
101}

1 //function: stopwatch with start/stop(button 1) and reset(button 2)
2//start/pause
3  button 1 
4//add lap function success!!
5//improve lap function scuuess!!
6
7  #include<LiquidCrystal.h>
8 LiquidCrystal lcd(12,11,7,6,5,4);
9
10 int ss1
11  = 0, ss2 = 0;
12 int pss1 = 0;
13 int ms=0,sec =0, minute=0;
14long interval
15  = 98;
16unsigned long last=0,dur,pre=0,last2=0,dur2;
17 int num_rise=0;
18bool
19  reset=0,row=0;
20
21void timeNprint(){
22    unsigned long curr = millis();
23
24    if (curr-pre>interval){
25    pre=curr;
26    ms++;
27      if (ms==10) {sec++;ms=0;}
28
29      if (sec==60) {sec=0;minute++;}
30    lcd.setCursor(0,0);
31      if (minute<10)
32  lcd.print("0");
33    lcd.print(minute);
34    lcd.print(":");
35    if (sec<10)
36  lcd.print("0");
37    lcd.print(sec);
38    lcd.print(":");
39    lcd.print(ms);
40
41    }
42}
43void printTime(){
44  lcd.setCursor(9,row);
45  row=!row;
46      if
47  (minute<10) lcd.print("0");
48    lcd.print(minute);
49    lcd.print(":");
50
51    if (sec<10) lcd.print("0");
52    lcd.print(sec);
53    lcd.print(":");
54
55    lcd.print(ms);
56  }
57void resetNwelcome(){
58  ms=0;minute=0;sec=0;
59
60  lcd.setCursor(0,1);
61  lcd.print("XW's Stopwatch");
62  lcd.setCursor(0,0);
63
64  lcd.print("Welcome to use");
65}
66
67void setup() {
68lcd.begin(16,2);
69pinMode(2,INPUT);
70pinMode(3,INPUT);
71}
72
73void
74  loop() {
75  num_rise=0;
76  resetNwelcome();
77  ss1=digitalRead(2);
78if (ss1
79  == HIGH) 
80{
81  num_rise++;
82  last=millis();
83  lcd.clear();
84  while(1)
85  //stop
86  {
87    switch(num_rise%2)
88    {
89      case 0:   //pause
90
91      ss2=digitalRead(3);
92      ss1=digitalRead(2);
93      dur=millis()-last;
94
95      if (ss2==HIGH) {reset=1;break;}
96      else if(ss1==HIGH && dur>300) {
97
98        num_rise++;
99        last=millis();}
100      break;
101      case 1:
102   
103      timeNprint();
104      ss1=digitalRead(2);dur=millis()-last;
105      if
106  (ss1==HIGH &&dur>300) {
107        num_rise++;
108        last=millis();
109        }
110  
111      break;
112      
113     }
114      ss2=digitalRead(3);
115      dur2=millis()-last2;
116
117    if(ss2==1 && dur2>300) 
118    {
119      last2=millis();
120      printTime();
121
122      }
123    if(reset==1) 
124    {reset=0;lcd.clear();row=0;break;}
125   }
126}
127}