Compilare: user.cpp: In function ‘int main()’: user.cpp:30:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ user.cpp:38:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&mat[k][i][j]); ^ user.cpp:97:18: warning: ‘plec’ may be used uninitialized in this function [-Wmaybe-uninitialized] sol[niv]=plec; ^