Compilare: user.cpp: In function ‘int main()’: user.cpp:12:11: warning: variable ‘v’ set but not used [-Wunused-but-set-variable] float v[300][300],z=18; ^ user.cpp:14:19: warning: unused variable ‘x1’ [-Wunused-variable] int i,j,n,x,y,x1,y1,x2,y2; ^ user.cpp:14:22: warning: unused variable ‘y1’ [-Wunused-variable] int i,j,n,x,y,x1,y1,x2,y2; ^ user.cpp:14:25: warning: unused variable ‘x2’ [-Wunused-variable] int i,j,n,x,y,x1,y1,x2,y2; ^ user.cpp:14:28: warning: unused variable ‘y2’ [-Wunused-variable] int i,j,n,x,y,x1,y1,x2,y2; ^ user.cpp:21:12: warning: array subscript is above array bounds [-Warray-bounds] a[2][i]=y; ^ user.cpp:26:56: warning: array subscript is above array bounds [-Warray-bounds] v[i][j]=sqrt(pow(a[1][j]-a[1][i],2)+pow(a[2][j]-a[2][i],2)); ^ user.cpp:26:64: warning: array subscript is above array bounds [-Warray-bounds] v[i][j]=sqrt(pow(a[1][j]-a[1][i],2)+pow(a[2][j]-a[2][i],2)); ^