Compilare: user.c: In function ‘main’: user.c:9:5: warning: format ‘%u’ expects argument of type ‘unsigned int *’, but argument 3 has type ‘long long unsigned int *’ [-Wformat=] fscanf(fi,"%ull%ull", &a, &b); ^ user.c:9:5: warning: format ‘%u’ expects argument of type ‘unsigned int *’, but argument 4 has type ‘long long unsigned int *’ [-Wformat=] user.c:11:5: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 3 has type ‘long long unsigned int’ [-Wformat=] fprintf(fo,"%ull", rez); ^ user.c:9:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%ull%ull", &a, &b); ^