Compilare: user.c: In function ‘main’: user.c:20:5: warning: format ‘%d’ expects argument of type ‘int *’, but argument 2 has type ‘int’ [-Wformat=] scanf("%d", a); ^ user.c:21:5: warning: format ‘%d’ expects argument of type ‘int *’, but argument 2 has type ‘int’ [-Wformat=] scanf("%d", b); ^ user.c:24:5: warning: statement with no effect [-Wunused-value] for (i; i <= b ; i++) { ^ user.c:20:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", a); ^ user.c:21:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", b); ^ user.c:20:10: warning: ‘a’ is used uninitialized in this function [-Wuninitialized] scanf("%d", a); ^ user.c:21:10: warning: ‘b’ is used uninitialized in this function [-Wuninitialized] scanf("%d", b); ^