Compilare: user.cpp: In function ‘int main()’: user.cpp:17:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%i",&n); ^ user.cpp:23:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%i",&v[i][0]); ^ user.cpp:49:22: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] poz=v[poz][2]; ^