Given big_num.h and big_num_driver.cpp implement, the big_num class so that the main in big_num_driver.cpp will work. Do not change the main it is good. see examples

//big_num_driver.cpp

#include #include #include #include "big_num.h"

int main() { std::string str; std::cout

//big_num.h

#ifndef BIGNUM_H #define BIGNUM_H #include #include #include #include

class big_num { public: big_num(std::string); friend std::ostream& operator

#endif

use C++

vocstartsoft:~/environment/Lab6 $ ./BigNum Enter a number: 98347901287 Enter a number: 38120383 98347901287 + 38120383 = 98386021670 vocstartsoft:~/environment/Lab6 $ ./BigNum Enter a number: 99999 Enter a number: 1 99999 + 1 = 100000 vocstartsoft:-/environment/Lab6 $ ./BigNum Enter a number: 321 Enter a number: 82344234789 321 82344234789 = 82344235110 vocstartsoft:~/environment/Lab. $ + vocstartsoft:~/environment/Lab6 $ ./BigNum Enter a number: 98347901287 Enter a number: 38120383 98347901287 + 38120383 = 98386021670 vocstartsoft:~/environment/Lab6 $ ./BigNum Enter a number: 99999 Enter a number: 1 99999 + 1 = 100000 vocstartsoft:-/environment/Lab6 $ ./BigNum Enter a number: 321 Enter a number: 82344234789 321 82344234789 = 82344235110 vocstartsoft:~/environment/Lab. $ +