[feat/fix/docs]: Improved on conversion code , length variable , asserts added

conversions/binary_to_decimal.c

@@ -1,24 +1,54 @@
-/**
- * Modified 07/12/2017, Kyler Smith
- *
- */
-
+#include <assert.h>
+#include <stdbool.h>
+#include <stdint.h>
 #include <stdio.h>
+#include <stdlib.h>
+
+bool is_binary(intmax_t num);
+int num_len(intmax_t num);
 
-int main()
+int main(void)
 {
-    int remainder, number = 0, decimal_number = 0, temp = 1;
-    printf("\n Enter any binary number= ");
-    scanf("%d", &number);
+    intmax_t remainder, number = 0, decimal_number = 0, temp = 1;
+
+    int length = num_len(INTMAX_MAX) - 1;
+    printf("\n Enter any binary number , max %d digits: ", length);
+    scanf("%jd", &number);
+    assert(num_len(number) <= length);
+    assert(is_binary(number));
 
     // Iterate over the number until the end.
-    while (number > 0)
-    {
+    while (number > 0) {
         remainder = number % 10;
         number = number / 10;
         decimal_number += remainder * temp;
-        temp = temp * 2;  // used as power of 2
+        temp = temp * 2; // used as power of 2
+    }
+
+    printf("%jd\n", decimal_number);
+    return 0;
+}
+
+bool is_binary(intmax_t num)
+{
+    int remainder = 0;
+
+    while (num > 0) {
+        remainder = num % 10;
+        if (remainder == 0 || remainder == 1) {
+            num /= 10;
+            continue;
+        } else
+            return false;
     }
+    return true;
+}
 
-    printf("%d\n", decimal_number);
+int num_len(intmax_t num)
+{
+    int i;
+    for (i = 0; num > 0; i++) {
+        num /= 10;
+    }
+    return i;
 }