Compilare: user.c:18: warning: return type defaults to 'int' user.c: In function 'main': user.c:34: warning: implicit declaration of function 'malloc' user.c:34: warning: incompatible implicit declaration of built-in function 'malloc' user.c:35: warning: suggest parentheses around comparison in operand of ^ user.c: In function 'printout': user.c:23: warning: control reaches end of non-void function