Compilare: user.cpp: In function ‘int main()’: user.cpp:16:33: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 3 has type ‘int*’ [-Wformat=] fscanf(InAB, "%ld\n%ld", &a, &b); ^ user.cpp:16:33: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 4 has type ‘int*’ [-Wformat=] user.cpp:18:27: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 3 has type ‘int’ [-Wformat=] fprintf(OutAB, "%ld", sum); ^ user.cpp:16:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(InAB, "%ld\n%ld", &a, &b); ^