Initial commit

Chapter1/Section3/hello.c

@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+int main(void)
+{
+    int *p = NULL;
+    int i;
+    p = (int *)malloc(sizeof(int));
+    if (p == NULL)
+        return -1;
+    printf("Hello world!\n");
+    return 0;
+}