added array to glob var

C/global_var.c

@@ -0,0 +1,32 @@
+//global variable example
+
+#include <stdio.h>
+
+int fun1(void);
+int fun2(void);
+int fun3(void);
+
+int x ; /* global */
+
+void main( )
+{
+    x = 10 ; /* global x */
+    printf("x = %d\n", x);
+    printf("x = %d\n", fun1());
+    printf("x = %d\n", fun2());
+    printf("x = %d\n", fun3());
+}
+fun1(void)
+{
+    x = x + 10 ;
+}
+int fun2(void)
+{
+    int x ; /* local */
+    x = 1 ;
+    return (x);
+}
+fun3(void)
+{
+    x = x + 10 ; /* global x */
+}