Up through lcthw 10

lcthw/.gitignore

@@ -3,3 +3,4 @@ ex3
 ex7
 ex8
 ex9
+ex10

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'

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;
+}