Compilare: user.cpp: In function ‘int main()’: user.cpp:33:26: warning: variable ‘s1’ set but not used [-Wunused-but-set-variable] int A, B, maxx = -Nmax, s1 = -1, s2; ^ user.cpp:33:35: warning: variable ‘s2’ set but not used [-Wunused-but-set-variable] int A, B, maxx = -Nmax, s1 = -1, s2; ^ user.cpp:36:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( f, "%d%d", &A, &B ); ^