klips/plates/cpp-launcher/apps/launcher.cpp

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/*#############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2019 Shaun Reed, all rights reserved ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ##
##############################################################################
## launcher.cpp
*/
#include <iostream>
#include <lib-launcher.hpp>
int main () {
// Because the launcher is this executable.. (main() will become our exe)
// Initialize the user choice to launcher problem at runtime
int pChoice = LAUNCH;
// Cast the integer pChoice into an assignment for our Problem enum
// No failsafes needed here since we know pChoice = LAUNCH
Problem pSelect = static_cast<Problem>(pChoice);
do
{
printf("\nWelcome to the cpp launcher!\n"
"Input the problem number to run the example.\n");
//ProblemList(); List and explain problem selection
//ProblemSelect(); Select problem, handle errors, return result to &pSelect
std::cin >> pChoice;
if(pChoice == LAUNCH)
{ // Ensure that pSelect = LAUNCH and restart
pSelect = static_cast<Problem>(pChoice);
std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
RunProblem(pSelect);
continue;
}
else if ( pChoice > QTY )
{ // If we have entered a value too large, restart
std::printf("\nThe value you entered is too large."
"\nPlease enter a value below %d\n", QTY);
pSelect = Problem::Launch; // Set our launcher to restart and continue
continue;
}
if (!std::cin )
{ // Check for cin error state
std::cin.clear();
std::cin.ignore();
pChoice = ERROR;
}
// One last input check for other error values
if (pChoice < EXIT) pChoice = ERROR;
// Cast the integer pChoice into an assignment for our Problem enum
pSelect = static_cast<Problem>(pChoice);
/*
* We should expect a clear input buffer at this point
* Clear cin up to next endline to prepare for the next input
* Depends on include <limits> for numeric_limits<streamsize>
*/
std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
// Run the problem, print exit, or print error.
RunProblem(pSelect);
// Run loop until invalid or exit input recieved
} while (pChoice > EXIT || pChoice == LAUNCH);
// Exit the launcher if the selection is in range
// Exit if pSelect is set to ERROR state value
return 0;
}