Is my code correct for converting binary to decimal number??

Question

Binary to Decimal conversion in C-Language
https://code.sololearn.com/cAeYHsJMZ22d/?ref=app

Answer 1

https://code.sololearn.com/c9BgrlPrrE3O/?ref=app

Answer 2

sololearn specific error
1. Conio.h header is not supported on sololearn

Remove all traces of conio.h library

Answer 3

can u pls help me fix all errors of this code