Compilare: main.cpp: In function 'int main()': main.cpp:105:48: warning: 'yj2' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<xi1<< ' '<<yj1<< ' '<<xi2<< ' '<<yj2; ^ main.cpp:105:40: warning: 'xi2' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<xi1<< ' '<<yj1<< ' '<<xi2<< ' '<<yj2; ^~~ main.cpp:105:29: warning: 'yj1' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<xi1<< ' '<<yj1<< ' '<<xi2<< ' '<<yj2; ^~~ main.cpp:105:18: warning: 'xi1' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<xi1<< ' '<<yj1<< ' '<<xi2<< ' '<<yj2; ^~~