Compilare: user.c: In function ‘main’: user.c:12:9: warning: format ‘%lld’ expects argument of type ‘long long int *’, but argument 3 has type ‘int *’ [-Wformat=] fscanf(fi, "%lld%lld", &a, &b); ^ user.c:12:9: warning: format ‘%lld’ expects argument of type ‘long long int *’, but argument 4 has type ‘int *’ [-Wformat=] user.c:43:9: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘int’ [-Wformat=] fprintf(fo, "%lld\n", a-rez); ^ user.c:10:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &m); ^ user.c:12:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%lld%lld", &a, &b); ^