/*
 * 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;
}