global variables

Author: ivanbrennan

prog.8.14.c

@@ -0,0 +1,61 @@
+// Program to convert a positive integer to another base
+
+#include <stdio.h>
+
+int			convertedNumber[64];
+long int	numberToConvert;
+int			base;
+int			digit = 0;
+
+void getNumberAndBase (void)
+{
+	printf ("Number to be converted? ");
+	scanf  ("%li", &numberToConvert);
+
+	printf ("Base? ");
+	scanf  ("%i", &base);
+
+	if ( base < 2 || base > 16 ) {
+		printf ("Bad base - must be between 2 and 16\n");
+		base = 10;
+	}
+}
+
+void convertNumber (void)
+{
+	do {
+		convertedNumber[digit] = numberToConvert % base;
+		++digit;
+		numberToConvert /= base;
+	}
+	while ( numberToConvert != 0 );
+}
+
+void displayConvertedNumber (void)
+{
+	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;
+}