GPA calculator

 #include<iostream>
 using namespace std;

  int main()
  {
    int n;

  cout<<"Enter number ";
 cin>>n;
  if(n>0&&n<=100)
  {
if(n>=80)
{
    cout<<"You get A+";
}
else if(n>=70)
{
    cout<<"You get A";
}

else if(n>=60)
{
    cout<<"You get A-";
}

else if(n>=50)
{
    cout<<"You get B";
}
else if(n>=40)
{
    cout<<"You get c";
}


else{
    cout<<"Fail";
}



  }
else
{
    cout<<"Enter number is invalid";
}
return 0;
}