Add new code

Signed-off-by: Carlos Maiolino <[email protected]>

1 files changed, 47 insertions, 0 deletions

diff --git a/C/Pointers/addr.c b/C/Pointers/addr.c
new file mode 100644
index 0000000..f77a9c6
--- /dev/null
+++ b/C/Pointers/addr.c
@@ -0,0 +1,47 @@
+#include <stdio.h>
+
+int main (void)
+{
+	/*
+	 * Arrays in C are just sequential data items
+	 * stored in a memory location
+	 * The address of the array, is the same as the first
+	 * element in the array
+	 * The name of the array is also the address of the array.
+	 */
+
+	char str1[] = "Hello cruel world"; /* \0 is automatically added */
+
+	/* Those variables look the same, but they are not. */
+
+	/* This is an array */
+
+	/*
+	 * str2, is the address of the "ARRAY" which the characters
+	 * of the string are stored
+	 * str2 is not a 'pointer' to the location of the Hello char array
+	 * str2 IS THE LOCATION of the array.
+	 */
+	char str2[] = "Hello";
+
+	/*
+	 * This is a pointer.
+	 *
+	 * Whose value is not the string, but the - address of that string -
+	 *
+	 */
+	char *str3 = "Goodbye";
+
+	str3 = NULL;
+	str2 = NULL;
+	/*
+	 * &str1, &str1[0] and str1, all points to the very same address.
+	 *
+	 * The array name, str1, is also the address of the array.
+	 * */
+	printf("%s, %c, %d, %d %d\n", str1, str1[0], &str1, &str1[0], str1);
+
+	printf("%p %p %s\n", &str2, str2, str2);
+	printf("%p %p %s\n", &str3, str3, str3);
+
+}