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correct_cpp_bool_to_coin

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Correct C++ chapter 'Hello CLI'.

Goal

Write an application with 100% code coverage

Prerequisites

Understand how this course works
Have written a correct 'is_odd' program

Exercise

Write a command-line interface (CLI) program that converts a boolean (true or false) to a coin's side (heads or tails respectively), followed by a newline. Fail if the user supplies no, two or more arguments.

Call to `bool_to_coin`	Output	Exit status
`./bool_to_coin`	Any	1
`./bool_to_coin true`	`heads` (with newline)	0
`./bool_to_coin false`	`tails` (with newline)	0
`./bool_to_coin nonsense`	Any	1
`./bool_to_coin true true`	Any	1

This is the code you start with:

#include <iostream>
#include <string>

int main(int argc, char* argv[]) 
{
  if (argc != 2) 
  {
    return 1;
  }
  if (std::string(argv[1]) == "true") 
  { 
    std::cout << "heads\n";   
  }
  else if (std::string(argv[1]) == "false") 
  { 
    std::cout << "tails\n"; 
  }
  else 
  {
    return 1;
  }
}

Your code needs to have 100% code coverage, regardless how it is called (that is, with zero, one or more arguments), see how to get 100 percent code coverage

External links

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