Compilare: user.cpp: In function ‘int main()’: user.cpp:18:18: warning: unused variable ‘x’ [-Wunused-variable] int n, k, i, x,min=-999999999,mini; ^ user.cpp:20:33: 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:21:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[1]); ^ user.cpp:27:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i]); ^ user.cpp:48:45: warning: ‘mini’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout, "%d %d %d", min, mini,mini-k+1); ^