Compilare: user.cpp: In function ‘int main()’: user.cpp:60:13: warning: variable ‘aux’ set but not used [-Wunused-but-set-variable] int aux; ^ user.cpp:31:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &n, &s); ^ user.cpp:34:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", & c[i], & gr[i]); ^