1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39/* compile, but don't link this file: * $ gcc -c obj.c */ #include <stdio.h> int add5(int num) { return num + 5; } int add10(int num) { num = add5(num); return add5(num); } const char *get_hello(void) { return "Hello, world!"; } static int var = 5; int get_var(void) { return var; } void set_var(int num) { var = num; } void say_hello(void) { puts("Hello, world!"); }