Compilare: user.cpp: In function ‘int main()’: user.cpp:8:21: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 3 has type ‘long int’ [-Wformat=] fscanf(f1,"%ld",a); ^ user.cpp:9:21: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 3 has type ‘long int’ [-Wformat=] fscanf(f1,"%ld",b); ^ user.cpp:10:21: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 3 has type ‘long int’ [-Wformat=] fscanf(f1,"%ld",c); ^