From 8f9842ddfb6b39a1141d1d44b89274e63d188f04 Mon Sep 17 00:00:00 2001
From: Dan Buch <dan@meatballhat.com>
Date: Tue, 16 Apr 2024 21:10:41 -0400
Subject: [PATCH] Up through lcthw 10

---
 lcthw/.gitignore |  1 +
 lcthw/Makefile   |  7 +++---
 lcthw/ex10.c     | 56 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 61 insertions(+), 3 deletions(-)
 create mode 100644 lcthw/ex10.c

diff --git a/lcthw/.gitignore b/lcthw/.gitignore
index f2ef6fa..a32a055 100644
--- a/lcthw/.gitignore
+++ b/lcthw/.gitignore
@@ -3,3 +3,4 @@ ex3
 ex7
 ex8
 ex9
+ex10
diff --git a/lcthw/Makefile b/lcthw/Makefile
index 00d8825..989a900 100644
--- a/lcthw/Makefile
+++ b/lcthw/Makefile
@@ -1,6 +1,7 @@
 CFLAGS ?= -Wall -g
 GDBRUN = gdb --batch --ex run --ex bt --ex q --args
-BUILD_TARGETS = ex1 ex3 ex7 ex8 ex9
+BUILD_TARGETS = ex1 ex3 ex7 ex8 ex9 ex10
+TEST_TARGETS = ex1 ex3 ex7 ex8 ex9
 
 .PHONY: all
 all: build test
@@ -14,10 +15,10 @@ build: $(BUILD_TARGETS)
 
 .PHONY: gtest
 gtest:
-	@$(foreach bt,$(BUILD_TARGETS),$(GDBRUN) ./$(bt) &&) \
+	@$(foreach bt,$(TEST_TARGETS),$(GDBRUN) ./$(bt) &&) \
 		echo '  gYAY'
 
 .PHONY: test
 test:
-	@$(foreach bt,$(BUILD_TARGETS),./$(bt) &&) \
+	@$(foreach bt,$(TEST_TARGETS),./$(bt) &&) \
 		echo '  YAY'
diff --git a/lcthw/ex10.c b/lcthw/ex10.c
new file mode 100644
index 0000000..1d3d1ba
--- /dev/null
+++ b/lcthw/ex10.c
@@ -0,0 +1,56 @@
+#include <stdio.h>
+
+int main(int argc, char *argv[])
+{
+	if (argc != 2) {
+		printf("ERROR: You need one argument.\n");
+		// this is how you abort a program
+		return 1;
+	}
+
+	int i = 0;
+	for (i = 0; argv[1][i] != '\0'; i++) {
+		char letter = argv[1][i];
+
+		switch (letter) {
+			case 'a':
+			case 'A':
+				printf("%d: 'A'\n", i);
+				break;
+
+			case 'e':
+			case 'E':
+				printf("%d: 'E'\n", i);
+				break;
+
+			case 'i':
+			case 'I':
+				printf("%d: 'I'\n", i);
+				break;
+
+			case 'o':
+			case 'O':
+				printf("%d: 'O'\n", i);
+				break;
+
+			case 'u':
+			case 'U':
+				printf("%d: 'U'\n", i);
+				break;
+
+			case 'y':
+			case 'Y':
+				// why i > 2? is this a bug?
+				if (i > 2) {
+					// it's only sometimes Y
+					printf("%d: 'Y'\n", i);
+				}
+				break;
+
+			default:
+				printf("%d: %c is not a vowel\n", i, letter);
+		}
+	}
+
+	return 0;
+}