C Binary using switch pro

C Program to Convert Hexadecimal to Binary

#include 

#include

#define Max 1000

int main()

{

char binarynum[Max], hexa[Max];

long int i = 0;

printf("Enter the value for hexadecimal ");

scanf("%s", hexa);

printf("\n Equivalent binary value: ");

while (hexa[i])

{

switch (hexa[i])

{

case '0':

printf("0000"); 

break;

case '1':

printf("0001");  

break;

case '2':

printf("0010");  

break;

case '3':

printf("0011"); 

break;

case '4':

printf("0100");  

break;

case '5':

printf("0101"); 

break;

case '6':

printf("0110"); 

break;

case '7':

printf("0111");  

break;

case '8':

printf("1000"); 

break;

case '9':

printf("1001"); 

break;

case 'A':

printf("1010"); 

break;

case 'B':

printf("1011");  

break;

case 'C':

printf("1100");  

break;

case 'D':

printf("1101"); 

 break;

case 'E':

printf("1110");  

break;

case 'F':

printf("1111"); 

break;

case 'a':

printf("1010");  

break;

case 'b':

printf("1011");  

break;

case 'c':

printf("1100"); 

break;

case 'd':

printf("1101");  

break;

case 'e':

printf("1110"); 

break;

case 'f':

printf("1111");  

break;

default:

printf("\n Invalid hexa digit %c ", hexa[i]);

return 0;

}

i++;

}

return 0;

}

Output

Enter the value for hexadecimal ab

Equivalent binary value: 10101011

C Program to Convert Octal to Binary

#include 

#include

#define Max 1000

int main()

{

char octalnum[Max];

long i = 0;

printf("Enter any octal number: ");

scanf("%s", octalnum);

printf("Equivalent binary value: ");

while (octalnum[i])

{

switch (octalnum[i])

{

case '0':

printf("000"); 

break;

case '1':

printf("001");  

break;

case '2':

printf("010"); 

break;

case '3':

printf("011");  

break;

case '4':

printf("100");  

break;

case '5':

printf("101");  

break;

case '6':

printf("110");  

break;

case '7':

printf("111");  

break;

default:

printf("\n Invalid octal digit %c ", octalnum[i]);

return 0;

}

i++;

}

return 0;

}

Output

Enter any octal number: a

Equivalent binary value:

Invalid octal digit a

Enter any octal number: 160

Equivalent binary value: 001110000

C Program to Print Diamond Pattern

#include 

#include   

int main()

{

int number, i, k, count = 1;

printf("Enter number of rows\n");

scanf("%d", &number);

count = number - 1;

for (k = 1; k <= number; k++)

{

for (i = 1; i <= count; i++)

printf(" ");

count--;

for (i = 1; i <= 2 * k - 1; i++)

printf("*");

printf("\n");

}

count = 1;

for (k = 1; k <= number - 1; k++)

{

for (i = 1; i <= count; i++)

printf(" ");

count++;

for (i = 1 ; i <= 2 *(number - k)-  1; i++)

printf("*");

printf("\n");

}

return 0;

}

Output

Enter number of rows

5

    *

   ***

  *****

 *******

*********

 *******

  *****

   ***

    *

C Program to Display the IP Address of the System

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

int main()

{

int n;

struct ifreq ifr;

char array[] = "eth0";

n = socket(AF_INET, SOCK_DGRAM, 0);

ifr.ifr_addr.sa_family = AF_INET;

strncpy(ifr.ifr_name , array , IFNAMSIZ - 1);

ioctl(n, SIOCGIFADDR, &ifr);

close(n);

printf("IP Address is %s - %s\n" , array , inet_ntoa(( (struct sockaddr_in *)&ifr.ifr_addr )->sin_addr) );

return 0;

}

Output

IP Address is eth0 - 192.168.225.135