Compilare: user.cpp: In function ‘void read()’: user.cpp:33:32: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘long long int*’ [-Wformat=] fscanf(fis, "%d %d", &a, &b); ^ user.cpp:33:32: warning: format ‘%d’ expects argument of type ‘int*’, but argument 4 has type ‘long long int*’ [-Wformat=] user.cpp: In function ‘void write()’: user.cpp:66:29: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(fis2, "%d\n", nr); ^