Compilare: user.c: In function ‘main’: user.c:6: warning: format ‘%d’ expects type ‘int *’, but argument 3 has type ‘long int *’ user.c:6: warning: format ‘%d’ expects type ‘int *’, but argument 4 has type ‘long int *’ user.c:7: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long int’ user.c:8: warning: format ‘%d’ expects type ‘int’, but argument 2 has type ‘long int’ user.c:6: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result