2, 8, and 16 hexadecimal to 10 hexadecimal output

# Include <iostream. h>

Int Len (0 );
// Check the number of hexadecimal values
Int check (char B [100])
{
For (INT I = 0; I <10; I ++)
{
If (B [I] = '\ 0 ')
{
Len = I;
Break;
}
}
If (B [0] = '0 ')
{
If (B [1] = 'X ')
{
If (B [len-1] = 'B ')
Return 2;
Else if (B [len-1] = 'H ')
Return 16;
}
Else
Return 8;
}
Else
{
Return 10;
}
}
// Convert hexadecimal letters into numbers
Int hexcode (char shex)
{

If (shex> = '0' & shex <= '9 ')
Return shex-'0 ';
Else if (shex> = 'A' & shex <= 'F ')
Return shex-'A' + 10;
Else if (shex> = 'A' & shex <= 'F ')
Return shex-'A' + 10;
Else
Return 0;
}
// Conversion Function
Void conver (char STR [10], int step)
{
Int sum (0), S (1), Max, min;
Bool hex = false;

Switch (STEP)
{
Case 16:
Hex = true;
Case 2:
Max = len-2;
Min = 2;
Break;
Case 8:
Max = len-1;
Min = 1;
Break;
Case 10:
For (Int J = 0; j <Len; j ++)
Cout <STR [J];
Cout <Endl;
Return;
}
For (INT I = max; I> = min; I --)
{
If (HEX)
Sum + = hexcode (STR [I]) * s;
Else
Sum + = (STR [I]-48) * s;
S * = step;
}

Cout <sum <Endl;
}
Void main ()
{
Char STR [100];

Cin. Getline (STR, 100 );

Switch (check (STR ))
{
Case 2:
Conver (STR, 2 );
Break;
Case 8:
Conver (STR, 8 );
Break;
Case 10:
Conver (STR, 10 );
Break;
Case 16:
Conver (STR, 16 );
Break;
}
}

Rules

123 // decimal
0xab2h // hexadecimal
0x1110b // binary
04234 // octal