Compilare: main.cpp: In function 'int main()': main.cpp:73:53: warning: 'col2' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<lin1<<" "<<col1<<" "<<lin2<<" "<<col2; ^ main.cpp:73:33: warning: 'col1' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<lin1<<" "<<col1<<" "<<lin2<<" "<<col2; ^~~ main.cpp:73:44: warning: 'lin2' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<lin1<<" "<<col1<<" "<<lin2<<" "<<col2; ^~~ main.cpp:73:22: warning: 'lin1' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<lin1<<" "<<col1<<" "<<lin2<<" "<<col2; ^~~