On 12/26/2010 8:30 AM, Jonathan Wakely wrote:
On 26 December 2010 06:58, ali hagigat wrote:Please look at the following program: main(){ printf("func1= %d\n", func1(10)); } /root/tmp3> gcc -c -o prog1.o prog1.c prog1.c: In function ‘main’: prog1.c:6: warning: incompatible implicit declaration of built-in function ‘printf’ ------------------------------------------------------------------- Why the declaration of printf is incomplete?http://c-faq.com/varargs/protos.html
#include-ing header files is always a good idea because the prototype statements ensure that you have called the function properly. That is, they are your friend.
