Compilare: user.cpp: In function ‘void fill(int, int, int&, int&)’: user.cpp:60:11: warning: unused variable ‘r’ [-Wunused-variable] int k,r,a,b; ^ user.cpp: In function ‘int main()’: user.cpp:85:13: warning: unused variable ‘a’ [-Wunused-variable] int i,j,a,b,directie,r,colori=0,intersectie; ^ user.cpp:85:15: warning: unused variable ‘b’ [-Wunused-variable] int i,j,a,b,directie,r,colori=0,intersectie; ^ user.cpp:85:26: warning: unused variable ‘r’ [-Wunused-variable] int i,j,a,b,directie,r,colori=0,intersectie; ^