Program to Convert BCD number into Decimal number | Java code to convert BCD to its decimal number ( base 10 ) . Including Header Files ; Function to convert BCD to Decimal ; Iterating through the bits backwards ; Forming the equivalent digit ( 0 to 9 ) from the group of 4. ; Reinitialize all variables and compute the number . ; Update the answer ; Reverse the number formed . ; Driver code ; Function Call
import java . io . * ; import java . util . * ; class GFG { public static int bcdToDecimal ( String s ) { int len = s . length ( ) ; int check = 0 , check0 = 0 ; int num = 0 , sum = 0 ; int mul = 1 , rev = 0 ; for ( int i = len - 1 ; i >= 0 ; i -- ) { sum += ( s . charAt ( i ) - '0' ) * mul ; mul *= 2 ; check ++ ; if ( check == 4 i == 0 ) { if ( sum == 0 && check0 == 0 ) { num = 1 ; check0 = 1 ; } else { num = num * 10 + sum ; } check = 0 ; sum = 0 ; mul = 1 ; } } while ( num > 0 ) { rev = rev * 10 + ( num % 10 ) ; num /= 10 ; } if ( check0 == 1 ) return rev - 1 ; return rev ; } public static void main ( String [ ] args ) { String s = "100000101000" ; System . out . println ( bcdToDecimal ( s ) ) ; } }