source code rentang nilai

#include<iostream.h>

void main()

{

int nilai;

cout<<"\t\t\t\t  DITA PASKI PRADEVI " <<endl;

cout<<"\t\t\t\t     065114112\n";

cout<<"\t\t\t\t      Class D\n";

cout<<"masukan nilai: ";

cin>>nilai;

if (nilai>=80 && nilai<=100)

cout<<"A";

else if (nilai>=70 && nilai<=79)

cout<<"B";

else if (nilai>=60 && nilai<=69)

cout<<"C";

else if (nilai>=50 && nilai<=59)

cout<<"D";

else if (nilai>=40 && nilai<=49)

cout<<"E";

else

cout<<"tidak lulus";

}