How can I call a specific object based off cin c++ -

so trying eliminate how reiterate same code in switch statement difference being object getting getanswer() method. appreciated

#include "main.hpp" #include "toolbox.hpp" #include <iostream> #include <chrono>  problem1 problem1; problem2 problem2; problem3 problem3; problem4 problem4; problem5 problem5; problem6 problem6; problem7 problem7; problem8 problem8; problem9 problem9; problem10 problem10; problem11 problem11; problem12 problem12; problem13 problem13; problem14 problem14; problem15 problem15; problem16 problem16;  void execute::print() {     int choice; {     std::cout << "please enter # of problem solve: ";     std::cin >> choice;     std::cout << std::endl;     switch (choice)     {     case 1:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem1.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 2:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem2.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 3:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem3.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 4:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem4.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 5:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem5.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 6:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem6.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 7:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem7.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 8:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem8.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 9:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem9.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 10:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem10.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 11:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem11.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 12:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem12.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 13:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem13.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 14:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem14.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 15:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem15.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     case 16:     {         auto timepoint1 = std::chrono::high_resolution_clock::now();         std::cout << problem16.getanswer() << std::endl;         auto timepoint2 = std::chrono::high_resolution_clock::now();         std::cout << std::endl;         std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl;         break;     }     default: std::cout << "problem not exist or not solved yet" << std::endl;     }  } while (choice != 17); 

}

i new programming , looking solution allows me pick correct class object , print out without having large switch statement takes way space

use function template , move details function template.

template <typename problem> void getanswer(problem& prob) {    auto timepoint1 = std::chrono::high_resolution_clock::now();    std::cout << prob.getanswer() << std::endl;    auto timepoint2 = std::chrono::high_resolution_clock::now();    std::cout << std::endl;    std::cout << "elapsed time: " << static_cast<std::chrono::duration<float>>(timepoint2 - timepoint1).count() << " seconds" << std::endl; }  void execute::print() {    int choice;    {       std::cout << "please enter # of problem solve: ";       std::cin >> choice;       std::cout << std::endl;        switch (choice)       {          case 1:          {             getanswer(problem1);             break;          }           case 2:          {             getanswer(problem2);             break;          }           // etc.       }    } } 

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