1 files changed, 20 insertions(+), 9 deletions(-)

M classwork/classwork12/classwork12.c

@@ 1,6 1,5 @@
 #include <stdio.h>
-
-#define MAX_CHARACTERS 20
+#include <stdlib.h>
 
 /*
  * William Culhane


@@ 8,14 7,19 @@
  * Wed Jun  2 12:19:42 PM MDT 2021
  */
 
-unsigned char count_chars(char word[MAX_CHARACTERS + 1]) {
+unsigned char count_chars(char word[], unsigned int length) {
   // Check if string is done
   if (word[0] == '\0') {
     return 0;
+  } else if (length < 1) {
+    // Length is too low; future allocations with lead to SEGFAULT
+    // Must panic
+    fprintf(stderr, "Input length longer than max!\n");
+    exit(5);
   } else {
     // Create a new word with the first character removed
-    char new_word[MAX_CHARACTERS];
-    for (unsigned char i = 0; i < MAX_CHARACTERS; i++) {
+    char new_word[length - 1];
+    for (unsigned char i = 0; i < length; i++) {
       // Check if last copied character was null
       if (word[i] == '\0') {
         break;


@@ 24,16 28,23 @@ unsigned char count_chars(char word[MAX_CHARACTERS + 1]) {
       }
     }
     // Count the characters in the word with a character missing
-    return (count_chars(new_word) + 1);
+    return (count_chars(new_word, length - 1) + 1);
   }
 }
 
 int main(void) {
-  char word[MAX_CHARACTERS + 1];
-  printf("Enter a word (max length %i characters)> ", MAX_CHARACTERS);
+  // Read max number of characters
+  unsigned int max_length = 20;
+  printf("Enter a max word length> ");
+  scanf("%u", &max_length);
+
+  // Read word itself
+  char word[max_length + 1];
+  printf("Enter a word (max length %i characters)> ", max_length);
   scanf("%s", word);
 
-  unsigned char length = count_chars(word);
+  // Output calculation and delivery
+  unsigned char length = count_chars(word, max_length);
   printf("Length: %hhu\n", length);
 
   return (0);