Compilare: user.cpp: In function ‘int main()’: user.cpp:61:13: warning: unused variable ‘maxim’ [-Wunused-variable] int i,j,maxim,k,x1,x2,y1,y2; ^~~~~ user.cpp:61:19: warning: unused variable ‘k’ [-Wunused-variable] int i,j,maxim,k,x1,x2,y1,y2; ^ user.cpp:61:21: warning: unused variable ‘x1’ [-Wunused-variable] int i,j,maxim,k,x1,x2,y1,y2; ^~ user.cpp:61:24: warning: unused variable ‘x2’ [-Wunused-variable] int i,j,maxim,k,x1,x2,y1,y2; ^~ user.cpp:61:27: warning: unused variable ‘y1’ [-Wunused-variable] int i,j,maxim,k,x1,x2,y1,y2; ^~ user.cpp:61:30: warning: unused variable ‘y2’ [-Wunused-variable] int i,j,maxim,k,x1,x2,y1,y2; ^~