Compilare: user.c: In function ‘Add’: user.c:18:5: warning: implicit declaration of function ‘malloc’ [-Wimplicit-function-declaration] list z = (list)malloc(sizeof(struct nod)); ^ user.c:18:20: warning: incompatible implicit declaration of built-in function ‘malloc’ [enabled by default] list z = (list)malloc(sizeof(struct nod)); ^ user.c: In function ‘Del’: user.c:36:5: warning: implicit declaration of function ‘free’ [-Wimplicit-function-declaration] free(z); ^ user.c:36:5: warning: incompatible implicit declaration of built-in function ‘free’ [enabled by default] user.c: In function ‘main’: user.c:53:11: warning: unused variable ‘value’ [-Wunused-variable] int i,value; ^