Compilare: user.cpp: In function ‘int main()’: user.cpp:11:18: warning: unused variable ‘j’ [-Wunused-variable] int n, k, i, j, nr, x; ^ user.cpp:12:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d%d", &n, &k); ^ user.cpp:14:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &x); ^