Question

I am trying to learn C for my class. One thing I need to know is given an array, I have to take information from two characters and store it in one bytes. For eg. if string is “A1B3C5” then I have to store A = 001 in higher 3bits and then store 1 in lower 5bits. I have to function that can get two chars from array at a time and print it here is that function,

 void print2(char string[])
{
    int i = 0;
    int length = 0;
    char char1, char2;
    length = strlen(string);
    for ( i = 0; i <length; i= i + 2)
    {
        char1 = string[i];
        char2 = string[i+1];
        printf("%c, %c\n", char1, char2);
    }
}

but now i am not sure how to get it encoded and then decode again. Can anyone help me please?

Answer 1

Assuming an ASCII character set, subtract ‘@’ from the letter and shift left five bits, then subtract ‘0’ from the character representing the digit and add it to the first part.