Compilare: main.cpp: In function 'int main()': main.cpp:84:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<c[i].contin.size();++j) ~^~~~~~~~~~~~~~~~~~~ main.cpp:105:25: warning: 'yy2' may be used uninitialized in this function [-Wmaybe-uninitialized] out<<xx2<<" "<<yy2<<" "<<xx1<<" "<<yy1; ^~~ main.cpp:105:43: warning: 'yy1' may be used uninitialized in this function [-Wmaybe-uninitialized] out<<xx2<<" "<<yy2<<" "<<xx1<<" "<<yy1; ^ main.cpp:105:15: warning: 'xx2' may be used uninitialized in this function [-Wmaybe-uninitialized] out<<xx2<<" "<<yy2<<" "<<xx1<<" "<<yy1; ^~~ main.cpp:105:35: warning: 'xx1' may be used uninitialized in this function [-Wmaybe-uninitialized] out<<xx2<<" "<<yy2<<" "<<xx1<<" "<<yy1; ^~~