Double Check, Using Switch to create function

[DS9596]

Not sure why it's not letting me choose the operation I want where I put "Enter an operation symbol..", I'm supposed to use switch statements to compute functions.

#include <iostream> 
#include<cmath>
#include <iomanip> 
#include <string>

using namespace std;

int main()
{
    int type;
    int a, b, c, d;
    char op;

    cout << fixed << showpoint << setprecision(2); 

    //select operation
    cout << "Enter a fraction: "; 
    cin >> a; cin.ignore(); cin >> b;
    cout << "Enter another fraction: ";
    cin >> c; cin.ignore(); cin >> d; 
    cout << "\tEnter an operation symbol (+,-, *, /): "; 
    cin >> op; cin.ignore();

    //operate function
    switch(op)
    {
    case '+' : cout << a << "/" << b << "+" << c << "/" << d << "=" << (a*d)+(c*b) << "/" << (d*b) << endl;
    break;
    case '-' : cout << a << "/" << b << "+" << c << "/" << d << "=" << (a*d)-(c*b) << "/" << (d*b) << endl;
    break;
    case '*' : cout << a << "/" << b << "+" << c << "/" << d << "=" << (a*c) << "/" << (d*b) << endl; 
    break;
    case '/' : cout << a << "/" << b << "+" << c << "/" << d << "=" << (a*d) << "/" << (c*b) << endl; 
    break;
    }


    //end program
    system ("pause");
    return 0; 
}

[Moschops]

In what way does it "not let you"? Does the keyboard refuse to accept any entry when you get to the operator selection?

[DS9596]

It comes out like this but when it asks for you to enter an operation symbol, it just automatically does it without letting me choose which one I want.

Enter a fraction: 12/5
Enter another fraction: 2.1/7.5
        Enter an operation symbol (+,-, *, /): 12/5+2/1=12/10
Press any key to continue . . .

[Moschops]

When it asks you to enter a fraction, you're supposed to just type number <enter> number<enter>. Not the / sign.

Enter a fraction: 2
3
Enter another fraction: 4
5
    Enter an operation symbol (+,-, *, /): +
2/3+4/5=22/15

You're typing strings made of number/number when it's expecting a single int value.

[DS9596]

Ok, so if I want to make the output look like this: How would I make it work?

Enter a fraction: 12/5
Enter another fraction: 2.1/7.5
        Enter an operation symbol (+,-, *, /): *
            (12.00/5.00)+(2.10/7.50) = 2.52/37.5
Press any key to continue . . .

[DS9596]

Enter a fraction: 12
5
Enter another fraction: 2.1
7.5
   Enter an operation symbol (+,-, *, /): *
        (12.00/5.00)+(2.10/7.50)=25.20/37.50
Press any key to continue . . .

I want it to look like this though:

Enter a fraction: 12/5
Enter another fraction: 2.1/7.5
        Enter an operation symbol (+,-, *, /): *
            (12.00/5.00)+(2.10/7.50) = 2.52/37.5
Press any key to continue . . .

[DS9596]

I think I got it nevermind.