Question

I have a string x that I need to convert into a hex format:

char x[5];
x[0]='0';
x[1]='1';
x[2]='0';
x[3]='1';  //x contains value of 0xA or decimal 10;
x[4]='\0';

Now how can I convert this and store it into an unsigned integer variable so the variable would be of value 0xA;

Thanks.

Answer 1

It seems that the number is stored in reversed direction, which is not natural for human to read, but quite a natural way to represent number as the index refers to the power of 2 that should be applied.

There is no existing library to do the conversion for you, you need to write code to parse it yourself:

int i = 0;
unsigned int result = 0;

while (x[i]) {
    result |= (x[i] == '1') << i;
    i++;
}