Question

I am trying to convert a binary array to decimal in following way:

uint8_t array[8] = {1,1,1,1,0,1,1,1} ;
int decimal = 0 ;    

for(int i = 0 ; i < 8 ; i++)
    decimal = (decimal << 1) + array[i] ;

Actually I have to convert 64 bit binary array to decimal and I have to do it for million times.

Can anybody help me, is there any faster way to do the above ? Or is the above one is nice ?

Answer 1

Your method is adequate, to call it nice I would just not mix bitwise operations and “mathematical” way of converting to decimal, i.e. use either

    decimal = decimal << 1 | array[i];

or

    decimal = decimal * 2 + array[i];