One Digit 7-Segment LED Display

1int a=7; 
2int b=6; 
3int c=5; 
4int d=11; 
5int e=10; 
6int
7  f=8; 
8int g=9; 
9int dp=4; 
10//display number 1
11void display1(void) 
12{
13  
14    digitalWrite(b,HIGH);
15    digitalWrite(c,HIGH);
16} 
17//display number2
18void
19  display2(void) 
20{
21    digitalWrite(a,HIGH);
22    digitalWrite(b,HIGH);
23
24    digitalWrite(g,HIGH);
25  digitalWrite(e,HIGH);
26    digitalWrite(d,HIGH);
27}
28  
29// display number3
30void display3(void) 
31{ 
32    digitalWrite(a,HIGH);
33
34    digitalWrite(b,HIGH);
35    
36  digitalWrite(c,HIGH);
37    digitalWrite(d,HIGH);
38
39    digitalWrite(g,HIGH);
40} 
41// display number4
42void display4(void) 
43{
44  
45    digitalWrite(f,HIGH);
46    digitalWrite(b,HIGH);
47    digitalWrite(g,HIGH);
48
49  digitalWrite(c,HIGH);
50  
51} 
52// display number5
53void display5(void)
54  
55{ 
56    digitalWrite(a,HIGH);
57    digitalWrite(f,HIGH);
58    digitalWrite(g,HIGH);
59
60  digitalWrite(c,HIGH);
61    digitalWrite(d,HIGH);
62} 
63// display number6
64void
65  display6(void) 
66{ 
67    digitalWrite(a,HIGH);
68    digitalWrite(f,HIGH);
69
70    digitalWrite(g,HIGH);
71  digitalWrite(c,HIGH);
72    digitalWrite(d,HIGH);
73  
74    digitalWrite(e,HIGH);  
75} 
76// display number7
77void display7(void)
78  
79{   
80   digitalWrite(a,HIGH);
81    digitalWrite(b,HIGH);
82    digitalWrite(c,HIGH);
83}
84  
85// display number8
86void display8(void) 
87{ 
88    digitalWrite(a,HIGH);
89
90    digitalWrite(b,HIGH);
91    digitalWrite(g,HIGH);
92  digitalWrite(c,HIGH);
93
94    digitalWrite(d,HIGH);  
95    digitalWrite(e,HIGH);  
96  digitalWrite(f,HIGH);
97  
98} 
99void clearDisplay(void) 
100{ 
101    digitalWrite(a,LOW);
102    digitalWrite(b,LOW);
103
104    digitalWrite(g,LOW);
105  digitalWrite(c,LOW);
106    digitalWrite(d,LOW);  
107
108    digitalWrite(e,LOW);  
109  digitalWrite(f,LOW);  
110} 
111void display9(void)
112  
113{ 
114    digitalWrite(a,HIGH);
115    digitalWrite(b,HIGH);
116    digitalWrite(g,HIGH);
117
118  digitalWrite(c,HIGH);
119    digitalWrite(d,HIGH);  
120  digitalWrite(f,HIGH);
121  
122} 
123void display0(void) 
124{ 
125    digitalWrite(a,HIGH);
126    digitalWrite(b,HIGH);
127
128  digitalWrite(c,HIGH);
129    digitalWrite(d,HIGH);  
130    digitalWrite(e,HIGH);
131  
132  digitalWrite(f,HIGH);  
133} 
134void setup() 
135{ 
136    int i;
137    for(i=4;i<=11;i++)
138  
139        pinMode(i,OUTPUT);
140} 
141void loop() 
142{     
143    while(1) 
144
145    {   clearDisplay();
146  display0(); 
147        delay(2000); 
148        clearDisplay();
149
150        display1(); 
151        delay(2000); 
152        clearDisplay();
153        display2();
154  
155        delay(2000); 
156        clearDisplay();
157        display3(); 
158
159        delay(2000);
160        clearDisplay();
161        display4(); 
162        delay(2000);
163
164        clearDisplay(); 
165        display5(); 
166        delay(2000);
167        clearDisplay();
168  
169        display6(); 
170        delay(2000);
171        clearDisplay(); 
172
173        display7(); 
174        delay(2000); 
175        clearDisplay();
176        display8();
177  
178        delay(2000); 
179        clearDisplay();  
180        display9(); 
181
182        delay(2000);      
183    }
184}

1int a=7; 
2int b=6; 
3int c=5; 
4int d=11; 
5int e=10; 
6int  f=8; 
7int g=9; 
8int dp=4; 
9//display number 1
10void display1(void) 
11{  
12    digitalWrite(b,HIGH);
13    digitalWrite(c,HIGH);
14} 
15//display number2
16void  display2(void) 
17{
18    digitalWrite(a,HIGH);
19    digitalWrite(b,HIGH);
20    digitalWrite(g,HIGH);
21  digitalWrite(e,HIGH);
22    digitalWrite(d,HIGH);
23}  
24// display number3
25void display3(void) 
26{ 
27    digitalWrite(a,HIGH);
28    digitalWrite(b,HIGH);
29    
30  digitalWrite(c,HIGH);
31    digitalWrite(d,HIGH);
32    digitalWrite(g,HIGH);
33} 
34// display number4
35void display4(void) 
36{  
37    digitalWrite(f,HIGH);
38    digitalWrite(b,HIGH);
39    digitalWrite(g,HIGH);
40  digitalWrite(c,HIGH);
41  
42} 
43// display number5
44void display5(void)  
45{ 
46    digitalWrite(a,HIGH);
47    digitalWrite(f,HIGH);
48    digitalWrite(g,HIGH);
49  digitalWrite(c,HIGH);
50    digitalWrite(d,HIGH);
51} 
52// display number6
53void  display6(void) 
54{ 
55    digitalWrite(a,HIGH);
56    digitalWrite(f,HIGH);
57    digitalWrite(g,HIGH);
58  digitalWrite(c,HIGH);
59    digitalWrite(d,HIGH);  
60    digitalWrite(e,HIGH);  
61} 
62// display number7
63void display7(void)  
64{   
65   digitalWrite(a,HIGH);
66    digitalWrite(b,HIGH);
67    digitalWrite(c,HIGH);
68}  
69// display number8
70void display8(void) 
71{ 
72    digitalWrite(a,HIGH);
73    digitalWrite(b,HIGH);
74    digitalWrite(g,HIGH);
75  digitalWrite(c,HIGH);
76    digitalWrite(d,HIGH);  
77    digitalWrite(e,HIGH);  
78  digitalWrite(f,HIGH);  
79} 
80void clearDisplay(void) 
81{ 
82    digitalWrite(a,LOW);
83    digitalWrite(b,LOW);
84    digitalWrite(g,LOW);
85  digitalWrite(c,LOW);
86    digitalWrite(d,LOW);  
87    digitalWrite(e,LOW);  
88  digitalWrite(f,LOW);  
89} 
90void display9(void)  
91{ 
92    digitalWrite(a,HIGH);
93    digitalWrite(b,HIGH);
94    digitalWrite(g,HIGH);
95  digitalWrite(c,HIGH);
96    digitalWrite(d,HIGH);  
97  digitalWrite(f,HIGH);  
98} 
99void display0(void) 
100{ 
101    digitalWrite(a,HIGH);
102    digitalWrite(b,HIGH);
103  digitalWrite(c,HIGH);
104    digitalWrite(d,HIGH);  
105    digitalWrite(e,HIGH);  
106  digitalWrite(f,HIGH);  
107} 
108void setup() 
109{ 
110    int i;
111    for(i=4;i<=11;i++)  
112        pinMode(i,OUTPUT);
113} 
114void loop() 
115{     
116    while(1) 
117    {   clearDisplay();
118  display0(); 
119        delay(2000); 
120        clearDisplay();
121        display1(); 
122        delay(2000); 
123        clearDisplay();
124        display2();  
125        delay(2000); 
126        clearDisplay();
127        display3(); 
128        delay(2000);
129        clearDisplay();
130        display4(); 
131        delay(2000);
132        clearDisplay(); 
133        display5(); 
134        delay(2000);
135        clearDisplay();  
136        display6(); 
137        delay(2000);
138        clearDisplay(); 
139        display7(); 
140        delay(2000); 
141        clearDisplay();
142        display8();  
143        delay(2000); 
144        clearDisplay();  
145        display9(); 
146        delay(2000);      
147    }
148}