Compilare: user.c: In function ‘main’: user.c:22:5: warning: format ‘%d’ expects argument of type ‘int *’, but argument 2 has type ‘long long int *’ [-Wformat=] scanf ( "%d %d %d %d" , &a , &b , &c , &k ); ^ user.c:22:5: warning: format ‘%d’ expects argument of type ‘int *’, but argument 3 has type ‘long long int *’ [-Wformat=] user.c:22:5: warning: format ‘%d’ expects argument of type ‘int *’, but argument 4 has type ‘long long int *’ [-Wformat=] user.c:22:5: warning: format ‘%d’ expects argument of type ‘int *’, but argument 5 has type ‘long long int *’ [-Wformat=] user.c:19:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen( "cifre.in" , "r" , stdin ); ^ user.c:20:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen( "cifre.out" , "w" , stdout); ^ user.c:22:11: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf ( "%d %d %d %d" , &a , &b , &c , &k ); ^