Compilare: user.c: In function ‘main’: user.c:24: warning: format ‘%d’ expects type ‘int *’, but argument 3 has type ‘long int *’ user.c:24: warning: format ‘%d’ expects type ‘int *’, but argument 4 has type ‘long int *’ user.c:20: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:24: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c: In function ‘euclid’: user.c:11: warning: control reaches end of non-void function