change nibble_in_hex

lab04/main.cpp

@@ -7,15 +7,7 @@ using namespace std;
 char nibble_to_hex(uint8_t i) //Conversion to hex format
 {
     assert(0x0 <= i && i <= 0xf);
-    //return "0123456789abcdef"[i];
-    if (i < 10)
-    {
-        return i + '0';
-    }
-    else
-    {
-        return 'a' + (i - 10);
-    }
+    return "0123456789abcdef"[i];
 }
 
 void print_in_hex(uint8_t byte)