Compilare: user.cpp: In function ‘void lee(int, int, int)’: user.cpp:23:27: warning: unused variable ‘j’ [-Wunused-variable] int p=0,u=0,X,Y,a,b,i,j; ^ user.cpp: In function ‘int main()’: user.cpp:56:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<strlen(buf);k++) ^ user.cpp:49:23: warning: unused variable ‘nr’ [-Wunused-variable] {int i,j,c=1,k,ok,x,y,nr,mx=0,a,b,s,h=0,aa,ab; ^ user.cpp:144:15: warning: ‘ab’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<aa<<" "<<ab<<" "<<mx+1<<'\n'; ^ user.cpp:144:6: warning: ‘aa’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<aa<<" "<<ab<<" "<<mx+1<<'\n'; ^