Compilare: user.cpp: In function ‘int main()’: user.cpp:27:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ user.cpp:30:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&a[i][j]); ^ user.cpp:49:15: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] lv=l+di[d]; ~~^~~~~~~~ user.cpp:50:15: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] cv=c+dj[d]; ~~^~~~~~~~