Compilare: user.cpp: In function ‘int Form()’: user.cpp:11:21: warning: unused variable ‘k’ [-Wunused-variable] int i,j,v1,v2,v,k=3; ^ user.cpp:22:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:59:11: warning: unused variable ‘i’ [-Wunused-variable] int w,i,j; ^ user.cpp:59:13: warning: unused variable ‘j’ [-Wunused-variable] int w,i,j; ^