Modifications to ex10

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 +1,62 @@
+#include <stdio.h>
+
+int main(int argc, char *argv[])
+{
+	if (argc < 2) {
+		printf("ERROR: You need at least one argument.\n");
+		// this is how you abort a program
+		return 1;
+	}
+
+	int i = 0;
+	int arg = 1;
+	for (arg = 1; arg < argc; arg++) {
+		for (i = 0; argv[arg][i] != '\0'; i++) {
+			printf("(%d) ", arg);
+
+			char letter = argv[arg][i];
+
+			// lowercase letters
+			if (letter >= 'A' && letter <= 'Z') {
+				letter += ('a' - 'A');
+			}
+
+			switch (letter) {
+				case 'a':
+					printf("%d: 'a'\n", i);
+					break;
+
+				case 'e':
+					printf("%d: 'e'\n", i);
+					break;
+
+				case 'i':
+					printf("%d: 'i'\n", i);
+					break;
+
+				case 'o':
+					printf("%d: 'o'\n", i);
+					break;
+
+				case 'u':
+					printf("%d: 'u'\n", i);
+					break;
+
+				case 'y':
+					// why i > 2? is this a bug?
+					if (i > 2) {
+						// it's only sometimes Y
+						printf("%d: 'y'\n", i);
+					} else {
+						printf("%d: %c is not a vowel\n", i, letter);
+					}
+					break;
+
+				default:
+					printf("%d: %c is not a vowel\n", i, letter);
+			}
+		}
+	}
+
+	return 0;
+}