1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
#include <stdio.h> #include "tutorial6.h" //int a = 3; //extern int a; void func1(void) { extern int a; a = 4; { extern int a; a = 99; { extern int a; printf("a is: %d\n",a); } } }