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#include <iostream>
using namespace std;
int main()
{
char go = 'y';
char letterGrade;
while(tolower(go) == 'y')
{
cout << "Input your letter grade: ";
cin >> letterGrade;
// use switch to replace if-else
switch(toupper(letterGrade))
{
case 'A':
cout << "Your score: 90-100.\n";
break;
case 'B':
cout << "Your score: 80-89.\n";
break;
case 'C':
cout << "Your score: 70-79.\n";
break;
}
cout << "Continue (y/n): ";
cin >> go;
}
return 0;
}