From 1d8d07efc9c0f3bdecc4faef991f0a1ac77b2146 Mon Sep 17 00:00:00 2001
From: Krishna Vedala <krishna.vedala@ieee.org>
Date: Wed, 8 Apr 2020 09:45:12 -0400
Subject: [PATCH] gets not a C11 standard, superceded by fgets

---
 conversions/hexadecimal_to_octal.c | 175 +++++++++++++++--------------
 1 file changed, 88 insertions(+), 87 deletions(-)

diff --git a/conversions/hexadecimal_to_octal.c b/conversions/hexadecimal_to_octal.c
index 097ba87c..7340dcd1 100644
--- a/conversions/hexadecimal_to_octal.c
+++ b/conversions/hexadecimal_to_octal.c
@@ -4,81 +4,82 @@
 
 int main()
 {
-    char hex[17];
+#define MAX_STR_LEN 17
+    char hex[MAX_STR_LEN];
     long long octal, bin, place;
     int i = 0, rem, val;
 
     /* Input hexadecimal number from user */
     printf("Enter any hexadecimal number: ");
-    gets(hex);
+    fgets(hex, MAX_STR_LEN, stdin);
 
     octal = 0ll;
     bin = 0ll;
     place = 0ll;
 
     /* Hexadecimal to binary conversion */
-    for(i=0; hex[i]!='\0'; i++)
+    for (i = 0; hex[i] != '\0'; i++)
     {
         bin = bin * place;
 
-        switch(hex[i])
+        switch (hex[i])
         {
-            case '0':
-                bin += 0;
-                break;
-            case '1':
-                bin += 1;
-                break;
-            case '2':
-                bin += 10;
-                break;
-            case '3':
-                bin += 11;
-                break;
-            case '4':
-                bin += 100;
-                break;
-            case '5':
-                bin += 101;
-                break;
-            case '6':
-                bin += 110;
-                break;
-            case '7':
-                bin += 111;
-                break;
-            case '8':
-                bin += 1000;
-                break;
-            case '9':
-                bin += 1001;
-                break;
-            case 'a':
-            case 'A':
-                bin += 1010;
-                break;
-            case 'b':
-            case 'B':
-                bin += 1011;
-                break;
-            case 'c':
-            case 'C':
-                bin += 1100;
-                break;
-            case 'd':
-            case 'D':
-                bin += 1101;
-                break;
-            case 'e':
-            case 'E':
-                bin += 1110;
-                break;
-            case 'f':
-            case 'F':
-                bin += 1111;
-                break;
-            default:
-                printf("Invalid hexadecimal input.");
+        case '0':
+            bin += 0;
+            break;
+        case '1':
+            bin += 1;
+            break;
+        case '2':
+            bin += 10;
+            break;
+        case '3':
+            bin += 11;
+            break;
+        case '4':
+            bin += 100;
+            break;
+        case '5':
+            bin += 101;
+            break;
+        case '6':
+            bin += 110;
+            break;
+        case '7':
+            bin += 111;
+            break;
+        case '8':
+            bin += 1000;
+            break;
+        case '9':
+            bin += 1001;
+            break;
+        case 'a':
+        case 'A':
+            bin += 1010;
+            break;
+        case 'b':
+        case 'B':
+            bin += 1011;
+            break;
+        case 'c':
+        case 'C':
+            bin += 1100;
+            break;
+        case 'd':
+        case 'D':
+            bin += 1101;
+            break;
+        case 'e':
+        case 'E':
+            bin += 1110;
+            break;
+        case 'f':
+        case 'F':
+            bin += 1111;
+            break;
+        default:
+            printf("Invalid hexadecimal input.");
         }
 
         place = 10000;
@@ -87,36 +88,36 @@ int main()
     place = 1;
 
     /* Binary to octal conversion */
-    while(bin > 0)
+    while (bin > 0)
     {
         rem = bin % 1000;
 
-        switch(rem)
+        switch (rem)
         {
-            case 0:
-                val = 0;
-                break;
-            case 1:
-                val = 1;
-                break;
-            case 10:
-                val = 2;
-                break;
-            case 11:
-                val = 3;
-                break;
-            case 100:
-                val = 4;
-                break;
-            case 101:
-                val = 5;
-                break;
-            case 110:
-                val = 6;
-                break;
-            case 111:
-                val = 7;
-                break;
+        case 0:
+            val = 0;
+            break;
+        case 1:
+            val = 1;
+            break;
+        case 10:
+            val = 2;
+            break;
+        case 11:
+            val = 3;
+            break;
+        case 100:
+            val = 4;
+            break;
+        case 101:
+            val = 5;
+            break;
+        case 110:
+            val = 6;
+            break;
+        case 111:
+            val = 7;
+            break;
         }
 
         octal = (val * place) + octal;
@@ -129,4 +130,4 @@ int main()
     printf("Octal number = %lld", octal);
 
     return 0;
-} 
+}