Storing to Arrays
Hey everyone, I'm having some trouble storing user input to an array in C++. I have created a class defining a fraction containing a numerator, denominator, and dash(/). I created an array of type fraction but I can't seem to store a user-inputted fraction to this array. cin is giving me an error "no operator '>>' matches these operands". I'm at a loss now.Thanks in advance for any tips guiding me in the right direction!Code:#include"stdafx.h" #include<iostream> usingnamespace std; classfraction { private: int numerator, denominator; //numerator and denominator variable initialization char dash; // "/" public: void getFraction() //get fraction function { cout << "Enter fraction (ex. 1/2) "; //prompts user to enter fraction cin >> numerator >> dash >> denominator; //reads user input from console } void displayFraction() //display fraction function { cout << numerator << dash << denominator << endl; //prints fraction to console } void addFraction(fractiona, fractionb) //add fractions function { numerator = (a.numerator * b.denominator) + (b.numerator * a.denominator); //calculates numerator denominator = a.denominator * b.denominator; //calculates denominator } void subtractFraction(fractiona, fractionb) //subtract fractions functions { numerator = (a.numerator * b.denominator) - (b.numerator * a.denominator); //calculates numerator denominator = a.denominator + b.denominator; //calculates denominator } void multiplyFraction(fractiona, fractionb) //multiply fractions function { numerator = a.numerator * b.numerator; //calculates numerator denominator = a.denominator + b.denominator; //calculates denominator } void divideFraction(fractiona, fractionb) //divide fractions function { numerator = a.numerator * b.denominator; //calculates numerator denominator = a.denominator + b.numerator; //calculates denominator } voidfraction::lowterms() // change ourself to lowest terms { long tnum, tden, temp, gcd; tnum = labs(numerator); // use non-negative copies tden = labs(denominator); // (needs cmath) if(tden==0 ) // check for n/0 { cout << "Illegal fraction: division by 0"; exit(1); } elseif( tnum==0 ) // check for 0/n { numerator=0; denominator = 1; return; } // this ‘while’ loop finds the gcd of tnum and tden while(tnum != 0) { if(tnum < tden) // ensure numerator larger { temp=tnum; tnum=tden; tden=temp; } // swap them tnum = tnum - tden; // subtract them } gcd = tden; // this is greatest common divisor numerator = numerator / gcd; // divide both num and den by gcd denominator = denominator / gcd; // to reduce frac to lowest terms cout << "Lowest Terms: " << numerator << dash << denominator << endl; //outputs lowest terms fraction to console } void averageFraction() { } }; int_tmain(intargc, _TCHAR* argv[]) { fraction a, b; //fraction 1 and fraction 2 char op, cont; //op = operator, cont = continue? int choice; for(int i = 1; i != 0;) //for loop running until user enters 'n' { int showanswer = 1; //decides whether or not to show answer cout << "Would you like to average fractions, or perform an operation? (1 = average, 2 = other) "; cin >> choice; if(choice == 1) { int arraysize = 0, numerator, denominator; char dash; cout << "How many fractions would you like to average? (Positive Integer)"; cin >> arraysize; fraction *array = newfraction[arraysize]; for(int i = 0; i < arraysize; i++) { cout << "Enter a fraction to average: (Ex. 3/4)"; cin >> *array; } cout << "You have chosen average!\n"; } elseif(choice == 2) { a.getFraction(); //calls getFraction function cout << "Enter Operator (+ - * /): "; //prompts user to enter operator cin >> op; //reads operator and stores in op b.getFraction(); //calls getFraction function if(op == '+'){ //checks if op is + a.addFraction(a, b); //calls add function if true i = 0; //sets i to 0 } elseif(op == '-'){ //checks if op is - a.subtractFraction(a, b); //calls subtract function if true i = 0; //sets i to 0 } elseif(op == '*'){ //checks if op is * a.multiplyFraction(a, b); //calls multiply function if true i = 0; //sets i to 0 } elseif(op == '/'){ //checks if op is / a.divideFraction(a, b); //calls divide function if true i = 0; //sets i to 0 } else{ cout << "You have entered an invalid operator, please use +, -, *, or /\n"; //prints to console if not + - * / i = 1; //sets i to 1 showanswer = 0; //doesn't show answer } if(showanswer == 1){ //if show answer is 1, run below a.displayFraction(); //displays fraction a.lowterms(); //displays fraction in lowest terms cout << "\nWould you like to perform another calculation? (y/n) "; //asks user if they would like to perform another calculation cin >> cont; //reads user input and stores in cont if(cont == 'y'){ //if yes i = 1; //run loop again } elseif(cont == 'n'){ //if no i = 0; //end loop and exit } else{ cout << "You have entered an invalid key. Exiting\n"; //if incorrect key i = 0; //exit } } } else { cout << "Invalid Option\n"; } } return 0; }
