Compilare: user.cpp: In function ‘void DI(long int, long int, long int, long int, long int)’: user.cpp:26:24: warning: unused variable ‘nP’ [-Wunused-variable] long int i, j, nx, ny, nP, nlx, nly, doi, pavela_DI; ^ user.cpp: In function ‘int main()’: user.cpp:57:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%ld %ld %ld\n",&N,&x,&y); ^