1 city.h Modify city.h from the previous lab according to the following: 1. Include utility library 2. Rather than having two protected data components, a City object may have a single data component name PopulationPair which is a pair of city name and its population (2 points). 3. The default constructor receives the two inputs as name and population (similar to previous case), and initializes the name PopulationPair (2 points). 4. setName(...) sets the name part of name PopulationPair (2 points). 5. set Population (...) sets the population part of namePopulationPair (2 points). 6. getName() returns the name part of name PopulationPair (2 points). 7. get Population () returns the population part of namePopulationPair (2 points). 8. printInfo() is the same as before. 2 main.cpp In main.cpp do the following step by step: 1. Include map as well as city.h. 2. Globally define array cityArray[] consisting of cities with the following details: (a) Los Angeles with population of 4 million (b) San Diego with population of 1.5 million (c) San Francisco with population of 900 thousand (d) Sacramento with population of 500 thousand (e) Stockton with the population of 300 thousand 3. Globally define a map from strings to unsigned integers, without initial values. Call it cityMap (1 points). 4. Define the following functions on maps. Pass all maps to these functions as reference. Moreover, annotate the input set to be constant, if the function is not supposed to modify that input map. In addition, use range-based for loops to traverse the maps. Note: When doing range-based for loop, each entry of map is essentially a pair. (a) Define function void initMap(...) that receives a map from strings to unsigned integers, an array of elements of type City as a second input, and an integer as its third input. The third input represents the number of elements in the input array. Initialize the input map with the elements existing in the input array, by setting the key/value components of each map entry (3 points). (b) Define function void printCityMap (...) that receives a map from strings to unsigned integers as input and prints the key/value entries within that map in the standard output (3 points). (c) Define function unsigned int findPopulation (...) that receives a map from strings to unsigned integers, along with a name of a city (a string). It returns the population of the city if there is a match. Otherwise, it returns 0 (3 points). (d) Define function void update Population (...) that receives a map from strings to un signed integers along with a name of city (a string) and the population of that city (an unsigned integer). If there is already an entry for the input city name, the population is updated within the map according to the input population. Otherwise, a new entry is created for the input city name and population within the input map (3 points). (e) Define function void removeFromCityMap (...) that receives a map from strings to unsigned integers as input, along with a name of a city (a string). It removes the entry associated with that city name. Avoid iterating on map entries (3 points). In main() function do the following step by step, using the functions defined above: (i) Initialize cityMap according to array cityArray [] using the function defined above (1 points). (ii) Print out the entries of cityMap, using the appropriate function defined above (1 points). (iii) Find population of Sacramento within cityMap using the function defined above, and print out the result (1 points) (iv) Find population of Chicago within cityMap using the function defined above, and print out the result (1 points) (v) Update the population of Stockton to 350000 within cityMap and then find its population within that map. Both functions are defined above (1 points) (vi) Update the population of Portland to 700000 within cityMap and then find its population within that map. Both functions are defined above (1 points) (vii) Remove San Francisco's entry from cityMap, and then print out the entries of this map (1 points). The output of the program may look like the following: Initializing cityMap with cityArray[] : Los Angeles: 4000000 Sacramento: 500000 San Diego: 1500000 San Francisco: 900000 Stockton: 300000 Find population of Sacramento: 500000 Find population of Chicago: 0 Find population of Stockton after update: 350000 Find population of Portland after update: 700000 Removing San Francisco from cityMap: Los Angeles: 4000000 Portland: 700000 Sacramento: 500000 San Diego: 1500000 Stockton: 350000 1 city.h Modify city.h from the previous lab according to the following: 1. Include utility library 2. Rather than having two protected data components, a City object may have a single data component name PopulationPair which is a pair of city name and its population (2 points). 3. The default constructor receives the two inputs as name and population (similar to previous case), and initializes the name PopulationPair (2 points). 4. setName(...) sets the name part of name PopulationPair (2 points). 5. set Population (...) sets the population part of namePopulationPair (2 points). 6. getName() returns the name part of name PopulationPair (2 points). 7. get Population () returns the population part of namePopulationPair (2 points). 8. printInfo() is the same as before. 2 main.cpp In main.cpp do the following step by step: 1. Include map as well as city.h. 2. Globally define array cityArray[] consisting of cities with the following details: (a) Los Angeles with population of 4 million (b) San Diego with population of 1.5 million (c) San Francisco with population of 900 thousand (d) Sacramento with population of 500 thousand (e) Stockton with the population of 300 thousand 3. Globally define a map from strings to unsigned integers, without initial values. Call it cityMap (1 points). 4. Define the following functions on maps. Pass all maps to these functions as reference. Moreover, annotate the input set to be constant, if the function is not supposed to modify that input map. In addition, use range-based for loops to traverse the maps. Note: When doing range-based for loop, each entry of map is essentially a pair. (a) Define function void initMap(...) that receives a map from strings to unsigned integers, an array of elements of type City as a second input, and an integer as its third input. The third input represents the number of elements in the input array. Initialize the input map with the elements existing in the input array, by setting the key/value components of each map entry (3 points). (b) Define function void printCityMap (...) that receives a map from strings to unsigned integers as input and prints the key/value entries within that map in the standard output (3 points). (c) Define function unsigned int findPopulation (...) that receives a map from strings to unsigned integers, along with a name of a city (a string). It returns the population of the city if there is a match. Otherwise, it returns 0 (3 points). (d) Define function void update Population (...) that receives a map from strings to un signed integers along with a name of city (a string) and the population of that city (an unsigned integer). If there is already an entry for the input city name, the population is updated within the map according to the input population. Otherwise, a new entry is created for the input city name and population within the input map (3 points). (e) Define function void removeFromCityMap (...) that receives a map from strings to unsigned integers as input, along with a name of a city (a string). It removes the entry associated with that city name. Avoid iterating on map entries (3 points). In main() function do the following step by step, using the functions defined above: (i) Initialize cityMap according to array cityArray [] using the function defined above (1 points). (ii) Print out the entries of cityMap, using the appropriate function defined above (1 points). (iii) Find population of Sacramento within cityMap using the function defined above, and print out the result (1 points) (iv) Find population of Chicago within cityMap using the function defined above, and print out the result (1 points) (v) Update the population of Stockton to 350000 within cityMap and then find its population within that map. Both functions are defined above (1 points) (vi) Update the population of Portland to 700000 within cityMap and then find its population within that map. Both functions are defined above (1 points) (vii) Remove San Francisco's entry from cityMap, and then print out the entries of this map (1 points). The output of the program may look like the following: Initializing cityMap with cityArray[] : Los Angeles: 4000000 Sacramento: 500000 San Diego: 1500000 San Francisco: 900000 Stockton: 300000 Find population of Sacramento: 500000 Find population of Chicago: 0 Find population of Stockton after update: 350000 Find population of Portland after update: 700000 Removing San Francisco from cityMap: Los Angeles: 4000000 Portland: 700000 Sacramento: 500000 San Diego: 1500000 Stockton: 350000