about switch statements

[closed account iz8p4iN6]

Hi guys so i was creating a calculator for fun and i want to include a feature where you can just type 'q' to go back to "main menu", type another operation like subtract or divide to use that operation, and im stuck on this thing...

I know to use switch statement to make it easier but if you have a statement like
case 'q':
//go back to main
break;

case '//an operations like - or *'
//go to - or *
break;

...

but then how do i still get the numbers they want to add from the user? i don't think you can do that or can you?

  switch (//the user input){
case 'q' :
    //here is the quit option;
    break;
case -:
    //here is the subtract option ;
    break;

case number???:
//this is the part im stuck how can i still get a user number so i can add it with a previous number they inputted???
}

thanks guys,
the dude

[closed account iz8p4iN6]

Like i tried putting another code outside the switch statement to add the previous user inputted number but it just did a random number like if 3 is the preivous input then i tried to add another input like 7 it gave me 58... what the heck???

[vasilenko93]

Try something like this.

string userInput = ... // get the input from the user
userInput = stripWhiteSpaces(userInput) // find a way to do this, must remove all spaces

if userInput[0] is oporator
    doOperator(userInput[0])
else if userInput[0] is number
    doNumber(userInput)
else
    print "Invalid input"

Now this pseudocode is oversimplified, but the idea is to make separate functions deal with operators and with numbers.