int main()

{

frac f1, f2, fans;

char op;



do {

cout << "nEnter fraction, operator, fraction";

cout << "nform 3/4 + 3/8 (or 0/1 + 0/1 to exit): ";

f1.inputfrac();

cin >> op;

f2.inputfrac();

switch(op) {

case '+':

fans = f1 + f2;

fans.outputfrac();

break;

case '-':

fans = f1 - f2;

fans.outputfrac();

break;

case '*':

fans = f1 * f2;

fans.outputfrac();

break;

case '/':

fans = f1 / f2;

fans.outputfrac();

break;

default:

cout << "No such operator";

} //end switch

} while( f1 != frac(0/1) || f2 != frac(0,1) );

cout << endl;

return 0;

}