Binary to integer

[astrogal]

"Hello

I have a long binary string in a char array like this

char abc [] = "100000001010000000110010";

I need to convert this string to a long long.
I can't use atoi to convert it to long long using atoll because this string is more than 10 (11 including null termination) characters long. And starts giving me junk values.

Once I convert it to an integer I will run a program / function to convert the long long number to its equivalent radix 10 format..

Does anyone have any suggestions how I can go about this? or some other way to approach this problem
Thanks in advance...

[grumpy]

Use a loop. Starting at the right end of the array, the value my be computed by multiplying each digit (0 or 1) by an appropriate power of 2, and adding up.

longlongvalue = 0*1 + 1*2 + 0*4 + 0*8 + 1*16 + 1*32 ..... <until beginning of array>.

where the digits I've coloured in red are the the digits, working backward from the end of the end of the array.

[CommonTater]

If your compiler has 64 bit ints... it should also have an strtoull() function... which is part of the C99 standard...

unsigned long long abcnum

abcnum = strtoull(abc,NULL,2);