prog.c: In function ‘main’:
prog.c:6:2: warning: implicit declaration of function ‘aa’ [-Wimplicit-function-declaration]
aa();
^~
prog.c: In function ‘aa’:
prog.c:10:15: error: ‘i’ undeclared (first use in this function)
printf("%d",i);
^
prog.c:10:15: note: each undeclared identifier is reported only once for each function it appears in
prog.c: At top level:
prog.c:12:12: warning: ‘i’ initialized and declared ‘extern’
extern int i=0;
^
prog.c: In function ‘aa’:
prog.c:11:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^