C Program to Convert Hexadecimal to Binary

#include < stdio.h>
#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 

For More Details Please Visit Ictjobs.info