Compilare: user.cpp: In function ‘void desc(int, int, int, int)’: user.cpp:15:9: warning: unused variable ‘nrim’ [-Wunused-variable] int nrim = (b - a + 1) - nrp; ^~~~ user.cpp: In function ‘int main()’: user.cpp:29:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^