interfacing of switch with 7segment in atmega16/32

#include<avr/io.h>

#include<util/delay.h>
  int arr[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

void main()

{
int i;

while(1)

{

DDRA=0XFF;

DDRC=0X00;

if(PINC&0X01)

{

for(i=0;i<=9;i++)

{

PORTA=arr[i];

_delay_ms(1000);

}

}

else

{

PORTA=0X00;

}

}
}

  

In this we are using int arr[]={…………….}; means hex form of 0-9 on segment .

format:-

0= 0x3F

1= 0X06

2 = 0X5B

3= 0X4F

4= 0X66

5= 0X6D

6= 0X7D

7= 0X07

8= 0X7F

9=0X6F

And for loop is using for complete the loop 0-9.

PINC&0X01 means PC0 is active high and by this way we can make high any pin as a switch.

And according to this program we can write more for programs  Like as using 2 segments and two switch. Like as 1 segment using two switch. Using more loops  etc.