converting hexadecimal number from a file to binary

[Anirudh_2]

Hi! I have a hexadecimal word in the form of a string, and i need to convert it into binary.
For eg : AA FF (there is a space in between the two parts). How do i convert this into binary ?

Thanks in advance :)

[Moschops]

By "binary" I assume you mean a string in which each character is a one or a zero.

Read in a char. Output four chars depending on what that input is, according to this table: http://www.learn44.com/wp-content/uploads/2011/08/Binary-to-Decimal-and-Hexadecimal-Conversion-Memorization-Chart.jpg

So AA would be 10101010

[Anirudh_2]

But how do i handle spaces in between ?

[Moschops]

If you want to retain the spaces in the output, if the input char is a space, output a space.

If you don't want to retain the spaces in the output, if the input char is a space, output nothing.

I think you really could have worked this out for yourself.

[Anirudh_2]

i'm sorry , but i'm new to programming.

whenever i encounter a space ,it stops converting. For example something like " BB 13" - In this space the part before the space alone is converted. the code is below .

Thanks :)

#include<stdio.h>
#include<conio.h>
#define MAX 1000

int main(){
    char binaryNumber[MAX], hexaDecimal[MAX];
    long int i = 0;

    printf("Enter any hexadecimal number: ");
    scanf("%s", hexaDecimal);

    printf("\nEquivalent binary value: ");
    while (hexaDecimal[i]){
        switch (hexaDecimal[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;
        case ' ': printf("  "); break;
        default:  printf("\nInvalid hexadecimal digit %c ", hexaDecimal[i]); 
        }
        i++;
    }
    getch();
    return 0;
}

[Moschops]

scanf with the %s parameter stops at spaces.

Either scanf again, over and over, or use fgets or getline to just read in the entire thing. https://stackoverflow.com/questions/1247989/how-do-you-allow-spaces-to-be-entered-using-scanf