added clarity to null statement

Author: robfox92

Ch1_Tutorial_Introduction/countchar.c

@@ -7,5 +7,6 @@ int main(){
   for (nc = 0; getchar != EOF; ++nc) //weird for loop that kinda goes forever?
     ;                                //do nothing within the loop
                                      //isolated semicolon to indicate nothing
+                                     //aka 'null statement'
   printf("%.0f\n", nc);
 }

Ch1_Tutorial_Introduction/stdin_test.c

@@ -4,11 +4,10 @@
 // program ends when end of file character is passed (CTRL+D)
 int main()
 {
-  int c;           // store the character as an integer
-
-
+  int c;                         // store the character as an integer
+  
   while ( (c=getchar()) != EOF){ // while the user has not entered an EOF char
-    putchar(c);   // print the character they enter
+    putchar(c);                  // print the character they enter
   }
   printf("You entered an EOF char\n");
   putchar(EOF);