init commit

learncthehardway/3/Makefile

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+CFLAGS=-Wall -g
+
+clean:
+		rm -f ex1

learncthehardway/3/ex3.c

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+#include <stdio.h>
+
+int main()
+{
+	int age = 10;
+	int height = 72;
+
+	printf("I am %d years old.\n", age );
+	printf("I am %d inches tall.\n", height);
+
+	return 0;
+}

learncthehardway/4/Makefile

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+CFLAGS=-Wall -g
+
+clean:
+		rm -f ex4

learncthehardway/4/ex4.c

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+#include <stdio.h>
+
+/* Warning: This program is wrong on purpose. */
+
+int main()
+{
+    int age = 10;
+    int height;
+
+    printf("I am %d years old.\n");
+    printf("I am %d inches tall.\n", height);
+
+    return 0;
+}

learncthehardway/ex10/ex10.c

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+#include <stdio.h>
+
+int main(int argc, char *argv[])
+{
+	int i = 0;
+
+	// go through each string in argv
+	for (i = 1; i < argc; i++) {
+		printf("arg %d: %s\n", i, argv[i]);
+	}
+
+	// Make an array of strings
+	char *states[] = { 
+		"California", "Oregon",
+		"Washington", "Texas"
+	};
+	int num_states = 4;
+	
+	for (i = 0; i < num_states; i++) {
+		printf("states %d: %s\n", i, states[i]);
+	}
+  return 0;
+}

learncthehardway/ex14/ex14.c

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+#include <stdio.h>
+#include <ctype.h>
+
+// forward declarations
+int can_print_it(char ch);
+void print_letters(char arg[]);
+
+void print_arguments(int argc, char *argv[])
+{
+    int i = 0;
+
+    for(i = 0; i < argc; i++) {
+        print_letters(argv[i]);
+    }
+}
+
+void print_letters(char arg[])
+{
+    int i = 0;
+
+    for(i = 0; arg[i] != '\0'; i++) {
+        char ch = arg[i];
+
+        if(can_print_it(ch)) {
+            printf("'%c' == %d ", ch, ch);
+        }
+    }
+
+    printf("\n");
+}
+
+int can_print_it(char ch)
+{
+    return isalpha(ch) || isblank(ch);
+}
+
+
+int main(int argc, char *argv[])
+{
+    print_arguments(argc, argv);
+    return 0;
+}

learncthehardway/ex9/notes

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+instead of doing something like
+
+char name[4] = "zed"
+do
+char *name = "zed"

learncthehardway/exc1/Makefile

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+CFLAGS=-Wall -g
+
+clean:
+		rm -f ex1
+all:
+	ex1

learncthehardway/exc1/ex1.c

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+#include <stdio.h>
+
+int main(int argc, char *argv[])
+{
+	puts("Hello world.");
+
+	return 0;
+}

learncthehardway/exc2/Makefile

@@ -0,0 +1,4 @@
+CFLAGS=-Wall -g
+
+clean:
+		rm -f ex1