Compilare: user.c:3: warning: return type of ‘main’ is not ‘int’ user.c: In function ‘main’: user.c:11: warning: format ‘%ld’ expects type ‘long int *’, but argument 3 has type ‘int *’ user.c:12: warning: format ‘%ld’ expects type ‘long int *’, but argument 3 has type ‘int *’ user.c:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:12: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result