#include <iostream> // cout, <<, >>#include <fstream> // istream, ofstream#include <string> // string#include <cassert> // assert ()#include <vector> // vector<T>#include "biginteger.h" // read(), add(), subtract(), multiply(), divide()int main(){ cout << "Enter First Operand: "; vector<double> numOperand1; cin >> numOperand1; // place first number in vector num1 cout << "Enter Second Operand: "; vector<double> numOperand2; cin >> num2; // place second number in vector num2 add(vector<double> numOperand1, vector<double> numOperand2); // determine the sum of the two operands cout << "The sum of operand1 and operand2 is: " << sum << "\n"; subtract(vector<double> numOperand1, vector<double> numOperand2); // determine the difference of the two operands cout << "The difference of operand1 and operand2 is: " << sum << "\n"; multiply(vector<double> numOperand1, vector<double> numOperand2); // determine the sum of the two operands cout << "The product of operand1 and operand2 is: " << sum << "\n"; divide(vector<double> numOperand1, vector<double> numOperand2); // determine the quotient of the two operands cout << "The quotient of operand1 and operand2 is: " << sum << "\n";}