Compilare: user.cpp: In function ‘int main()’: user.cpp:41:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d%d%d", &n, &m, &k, &x ) ; ^ user.cpp:44:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &elem ) ; ^ user.cpp:114:11: warning: ‘poz_l’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf (fout, "%d", pasi[poz_l][poz_c][k] ) ; ^ user.cpp:114:11: warning: ‘poz_c’ may be used uninitialized in this function [-Wmaybe-uninitialized]