Compilare: user.cpp: In function ‘int main()’: user.cpp:13:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%i",&q); ^ user.cpp:18:105: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%i %i %i %i %i %i %i",&sol[1][1],&sol[1][2],&sol[1][3],&v[3][3],&v[2][3],&v[1][3],&n); ^