Compilare: user.c:5: warning: conflicting types for built-in function ‘pow’ user.c: In function ‘ultima_cifra’: user.c:44: warning: unused variable ‘rest’ user.c: In function ‘main’: user.c:83: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:89: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:104: warning: control reaches end of non-void function user.c: In function ‘ultima_cifra’: user.c:64: warning: control reaches end of non-void function