Programming in C

154 Chapter 8 Working with Functions

const char baseDigits[16] =

{ '0', '1', '2', '3', '4', '5', '6', '7',

'8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };

int nextDigit;

printf ("Converted number = ");

for (--digit; digit >= 0; --digit ) {

nextDigit = convertedNumber[digit];

printf ("%c", baseDigits[nextDigit]);

}

printf ("\n");

}

int main (void)

{

void getNumberAndBase (void), convertNumber (void),

displayConvertedNumber (void);

getNumberAndBase ();

convertNumber ();

displayConvertedNumber ();

return 0;

}

Program 8.14 Output

Number to be converted? 100

Base? 8

Converted number = 144

Program 8.14 Output (Rerun)

Number to be converted? 1983

Base? 0

Bad base - must be between 2 and 16

Converted number = 1983

Notice how the wise choice of function names makes the operation of Program 8.14

clear. Spelled out directly in the mainroutine is the function of the program: to get a

number and a base, convert the number, and then display the converted number.The

Program 8.14 Continued