Compilare: user.cpp: In function ‘int main()’: user.cpp:8:15: warning: unused variable ‘j’ [-Wunused-variable] int n, i, j, k, m, l, q; ^ user.cpp:8:21: warning: unused variable ‘m’ [-Wunused-variable] int n, i, j, k, m, l, q; ^ user.cpp:8:27: warning: variable ‘q’ set but not used [-Wunused-but-set-variable] int n, i, j, k, m, l, q; ^ user.cpp:15:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d", &n, &k); ^ user.cpp:18:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &l); ^