Write a C++ program that asks the user to enter the population of 4 cities and produce the bar graph. USE A DO-WHILE LOOP

Input validation: Do not accept population less than 0.

Here is an example of programs output if user input is less than zero.

Enter the population of city 1 : -20 Enter the population of city 2 : 3000 Enter the population of city 3 : 4000 Enter the population of city 4 : 8000

RESULTS BELOW:

Population cant be negative. Please re-enter

// Program should allow user to re-enter after error message

Enter the population of city 1 : 2000 Enter the population of city 2 : 3000 Enter the population of city 3 : 4000 Enter the population of city 4 : 8000

OUTPUT BELOW:

POPULATION (each * = 1000 people) City 1 : ** City 2 : *** City 3 : **** City 4: ********