c++ "switch" help

[ttrexler99]

how do i convert this into a switch, i did this code then my teacher said use a switch statement?

if (score > 90)
cout << 'A';
else if (score > 80)
cout << 'B';
else if (score >70)
cout << 'C';
else if (score > 60)
cout << 'D';
else
cout << 'F';

[Collin665]

Maybe I'm wrong because I'm new to C++, but wouldn't a switch statement be much less useful in this case versus using an if/else-if structure?

Switches can only compare an expression against a constant, meaning you'd have to do like case 1: case 2: case 3: and so on for every single number.

[ttrexler99]

haha yeah maybe but thats just what she told me to do. i am looking off shit on another website and i think i might understand how to do it for the most part

[editline]13th December 2010[/editline]

#include <iostream>
using namespace std;
int main(void)
{
char grade;
cout << "Enter your grade: ";
cin >> grade;
switch (grade)
{
case 'A':
cout << "Your average must be between 90 - 100"
<< endl;
break;
case 'B':
cout << "Your average must be between 80 - 89"
<< endl;
break;
case 'C':
cout << "Your average must be between 70 - 79"
<< endl;
break;
case 'D':
cout << "Your average must be between 60 - 69"
<< endl;
break;
default:
cout << "Your average must be below 60" << endl;
}
return 0;
}

i have that but she wants it to be the opposite way like if i enter a number it will give me a letter grade

[SubjectX10]

[QUOTE=ttrexler99;26668444]i have that but she wants it to be the opposite way like if i enter a number it will give me a letter grade[/QUOTE]
Show her that e.g. case > 90 doesn't work.

[BlkDucky]

[QUOTE=ttrexler99;26668444]i have that but she wants it to be the opposite way like if i enter a number it will give me a letter grade[/QUOTE]

You can't do that with a switch statement. :/
Not really sure what you can do here except tell her that.

[ttrexler99]

alright thanks

[Collin665]

:downs:
MUCH MORE EFFICIENT THAN USING IF/ELSE-IF.

case 105:
case 104:
case 103:
case 102:
case 101:
case 100:
case 99:
case 98:
case 97:
case 96:
case 95:
case 94:
case 93:
case 92:
case 91:
case 90:
    cout << "YOU GOT AN A GOOD JOB."
    break;
 
case 89:
case 88:
case 87:
case 86:
case 85:
case 84:
case 83:
case 82:
case 81:
case 80:
    cout << "YOU GOT A B GOOD JOB."
    break;
 
case 79:
case 78:
case 77:
case 76:
case 75:
case 74:
case 73:
case 72:
case 71:
case 70:
    cout << "YOU GOT A C..."
    break;
 
case 69:
case 68:
case 67:
case 66:
case 65:
case 64:
case 63:
case 62:
case 61:
case 60:
    cout << "WHY YOU GOT D?"
    break;
 
default: 
    cout << "YOU OBVIOUSLY SUCK BECAUSE YOU GOT AN F."
    break;

[SubjectX10]

That is possible too....

[editline]13th December 2010[/editline]

But it's a horrible way to do that kind of thing, just stick with ifs.