programming.js

'the apple purchase process begins';

'Declare a variable `lowestPriceFruitStore`, used to represent the fruit store with the lowest apple prices.';
for(fruitStore of [fruitStroe0, fruitStroe1, fruitStroe2]){
  'start visiting the fruit store';
  'walk to the fruit shop';

  if('the fruit store was not open'){
    'stop the process of visiting the fruit store';
  }

  if('the fruit store did not have apples'){
    'stop the process of visiting the fruit store';
  }

  if('there is less than one kilogram of red apples left in the fruit shop'){
    'stop the process of visiting the fruit store';
  }

  if('current apple prices in the fruit store' < 'the apple prices of lowestPriceFruitStore'){
    'assign the current fruit store to lowestPriceFruitStore'
  }
}

'start visiting the `lowestPriceFruitStore`';
'walk to the fruit shop';

while('the apples in this bag weigh less than 1 kilogram'){
  'choose the best of all the red apples that are not in the bag';

  if('this apple can fit into the current bag'){
    'load this apple into the current bag';
  } else {
    // switch the bag
    if('I still have some spare bags') {
      'pick one of these and make it the current bag';
    } else {
      try('ask the shopkeeper for a bag') {
        'take the bag the shopkeeper gave me as the current bag';
      } catch ('the shopkeeper refused to give me the bag') {
        'take all the apples out of all my bags';
        'stop the process of visiting the fruit store';
      }
    }
  }
}

'based on the total weight of all the apples in all my bags and \
  the unit price given by the store owner, calculate the price I should pay'

'ask the shopkeeper for my share of the money'

if('the price I calculated' == 'the price given by the shopkeeper') {
  'pay the money to the shopkeeper';
} else {
  'recalculate the price of the apples';
  'explain the price I have calculated to the shopkeeper and ask him if he agrees';
  if('he agrees'){
    'pay the money to the shopkeeper';
  } else {
    'take all the apples out of all my bags';
    'stop the process of visiting the fruit store';
  }
}

'complete the purchase process and take away all the apples';

'the apple purchase process ends';