2ndarvu teisendaja 10ndsüsteemi programm

bintodec.c

+/**
+ * File:		bintodec.c
+ * Author:		Rainer Liis
+ * Created: 	10.10.2017
+ * Last edit:	16.10.2017
+ * 
+ * Description: Converting binary numbers to decimal.
+ */
+ 
+#include <stdio.h>
+
+int i; // counter
+int n; //length of number
+int y = 0; //decimal number
+int binary[20]; //array for binary digits
+
+int main(void)
+{
+	printf ("How long is the binary number you wish to convert?(max 20)");
+	scanf ("%d", &n); // length of binary number
+
+    for (i = 0; i < n; i++)
+    {
+		printf ("Enter digit nr %d of the binary number you wish to convert"
+		" to decimal: \n", i + 1);
+		scanf ("%d", &binary[i]); // writes digits into array
+
+		do // checks if digit is binary, if not enter new digit
+		{ 
+			if (binary[i] != 1 && binary[i] != 0)
+			{
+				printf ("You have entered a non-binary digit, re-enter a new "
+				"single digit nr %d\n", i);
+				scanf ("%d", &binary[i]);
+			}
+		}
+		while (binary[i] != 1 && binary[i] != 0); // while digit is not binary
+	}
+	
+	printf(" \n");
+	
+	for (i = 0; i < n; i++)
+	{
+		printf ("%d", binary[i]); // prints out array, showing the binary number
+	}
+	
+	printf (" converted to decimal is: ");
+	
+	for (i = 0; i < n; i++)
+	{
+		y = 2*y + binary[i]; // calculates the decimal value
+	}
+
+	printf ("%d", y);
+	
+	return 0;
+}