Compilare: main.cpp: In function 'int main()': main.cpp:29:10: warning: statement has no effect [-Wunused-value] for(i;i<=n;i++) ^ main.cpp:9:13: warning: unused variable 'j' [-Wunused-variable] int n,i,j,k,suma=0,level,x,lcur=0,dcur=0,lx = 0,dx = 0; ^ main.cpp:9:15: warning: unused variable 'k' [-Wunused-variable] int n,i,j,k,suma=0,level,x,lcur=0,dcur=0,lx = 0,dx = 0; ^ main.cpp:9:24: warning: unused variable 'level' [-Wunused-variable] int n,i,j,k,suma=0,level,x,lcur=0,dcur=0,lx = 0,dx = 0; ^~~~~