1 #include <lib9.h> 2 3 int 4 abs(int a) 5 { 6 if(a < 0) 7 return -a; 8 return a; 9 } 10 11 long 12 labs(long a) 13 { 14 if(a < 0) 15 return -a; 16 return a; 17 } 18