menentukan nilai dengan if else

#include <iostream>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char** argv) {
int nilai;
cout<<"masukan nilai= ";cin>>nilai;
if(nilai>=80)
cout<<"A";
else if(nilai>65)
cout<<"B";
else if(nilai>55)
cout<<"c";
else
cout<<"tidak lulus";
return 0;
}