error!

[June]

can anybody tell me what does this compiling error mean?
stack_01.c: In function `main':
stack_01.c:64: warning: return type of `main' is not `int'
Undefined first referenced
symbol in file
pirntf /var/tmp/ccyPnjcd.o
ld: fatal: Symbol referencing errors. No output written to stack_01
collect2: ld returned 1 exit status

[shaik786]

1.) make your main() return a value: int main()
2.) pirntf() or printf()?

[June]

Oh! I see, thank you!