Compilare: main.cpp: In function 'int main()': main.cpp:79:59: warning: self-comparison always evaluates to true [-Wtautological-compare] if ((((ok1 && ok2) && (ok3 && ok4)) && a[x4][y4]==a[x4][y4]) && viz[x4][y4]!=viz[x3][y3]) ~~~~~~~~~^~~~~~~~~~~ main.cpp:32:69: warning: 'cul' may be used uninitialized in this function [-Wmaybe-uninitialized] { int i,j,area=0,x1,x2,y1,y2,x,y,sol=0,v,x3,y3,x4,y4,p,q,r,t;char cul;bool ok1,ok2,ok3,ok4; ^~~ main.cpp:87:34: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<x<<" "<<y<<'\n'<<cul<<'\n'; ^~~~ main.cpp:87:15: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<x<<" "<<y<<'\n'<<cul<<'\n'; ^~~