From 4b03274352943d7998f87394023d01427b0055a0 Mon Sep 17 00:00:00 2001
From: SakurajimaShida <reinakobayashi1217@gmail.com>
Date: Tue, 19 Aug 2025 13:58:39 -0700
Subject: [PATCH] Skeleton prototype for exercise 1-13.

---
 KNR C/ex1_13.c | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 KNR C/ex1_13.c

diff --git a/KNR C/ex1_13.c b/KNR C/ex1_13.c
new file mode 100644
index 0000000..6cc80ef
--- /dev/null
+++ b/KNR C/ex1_13.c	
@@ -0,0 +1,41 @@
+#include <stdio.h>
+
+#define IN 1 /*State when selected character is within a word*/
+#define OUT 0 /*State when selected character is any kind of whitespace*/
+
+
+
+int main(){
+
+	int charCount[10]; /*Array for storing char lengths*/
+
+	int last, lCount, state, i; /*last stores last character, or 0 at init. lCount increments every time the main for loop encounters a non-newline/whitespace character and then resets when one is encountered after commiting its value to charCount.*/
+	/*Begin array initialization*/
+	for(i = 0; i < 10; ++i){
+		charCount[i] = 0;
+		}
+	/*End array init*/
+	
+
+	last = lCount = 0;
+
+	for(int a = getchar(); a != EOF; a = getchar()){
+
+		if(a == '\t' || a == ' ' || a == '\n'){ /*Check if current char is WS. If so, set state to OUT and check if the last character was not. If it was not, then we are exiting a word, and so comitting lCount to charCount.*/
+			state = OUT;
+			if (last != '\t' && last != ' ' && last != '\n'){ /*True on word exit only.*/
+				++charCount[lCount-'0'];
+				lCount = 0;
+			} 
+
+		} else { 
+			state = IN;
+			++lCount; /*Increment lCount when encountering a non-WS character.*/
+			}
+		last = a;
+		}
+	printf("Word letter count composition:\n1 2 3 4 5 6 7 8 9 10\n");
+	for (i = 0; i < 10; ++i)
+		printf("%d ", charCount[i]);
+	return 0;
+	}