Compilare: main.cpp: In function 'int main()': main.cpp:41:20: warning: unused variable 'x' [-Wunused-variable] int n,mm,st,dr,x,y,s=0,m,x1,x2,y1,y2,poz1,poz2,cnt=0,i,j,l,c,cnt1=0,cnt2=0,lf,cf,dir; ^ main.cpp:41:22: warning: unused variable 'y' [-Wunused-variable] int n,mm,st,dr,x,y,s=0,m,x1,x2,y1,y2,poz1,poz2,cnt=0,i,j,l,c,cnt1=0,cnt2=0,lf,cf,dir; ^ main.cpp:41:60: warning: unused variable 'j' [-Wunused-variable] int n,mm,st,dr,x,y,s=0,m,x1,x2,y1,y2,poz1,poz2,cnt=0,i,j,l,c,cnt1=0,cnt2=0,lf,cf,dir; ^ main.cpp:41:80: warning: unused variable 'lf' [-Wunused-variable] int n,mm,st,dr,x,y,s=0,m,x1,x2,y1,y2,poz1,poz2,cnt=0,i,j,l,c,cnt1=0,cnt2=0,lf,cf,dir; ^~ main.cpp:41:83: warning: unused variable 'cf' [-Wunused-variable] int n,mm,st,dr,x,y,s=0,m,x1,x2,y1,y2,poz1,poz2,cnt=0,i,j,l,c,cnt1=0,cnt2=0,lf,cf,dir; ^~ main.cpp:240:22: warning: 'dr' may be used uninitialized in this function [-Wmaybe-uninitialized] m=(st+dr)/2; ~~~^~~~ main.cpp:240:22: warning: 'st' may be used uninitialized in this function [-Wmaybe-uninitialized]