How to output specific character in the array-CodePudding

I have exercise in Course project which I've been struggling to solve B), I can`t find information in Internet how to output specific character in the list of array. The assignment is:

The elements of the array are names of towns beginning with an uppercase letter.

A) entering the elements of the array (no more than 50)
B) output all towns in whose names the letter "e" or "E" occurs 2,3 or 4 times, and the letter "r" does not occur even once.

I only wrote A) and it is:

string\[\] city;
city = new string \[50\] {i listed 50 cities}

The language I use is C#.

Thank you in advance!

CodePudding user response：

First part of the code string[] cities = { "varna", "burgas", "var", "sofia", "eseema", "peteeee" };

And here u go

    foreach (var city in cities)
        {
            if (city.ToLower().Contains("r"))
            {
                Console.WriteLine(city);
            }

            var eCount = city.ToLower().Count(x => x.ToString().Equals("e"));
            if (eCount >= 2 && eCount <= 4)
            {
                Console.WriteLine(city);
            }

        }

you can do something like that. Hope its help

CodePudding user response：

You can initialize a string-array with:

var cities = new string[] { "New York", "Chicago", ... , "Stockholm", "Helsinki" };

However, the assignment seem to ask the student to create a program that will accept input from the user of the program. For this you can use Console.ReadLine:

var cities = new string[50];
int i=0;
do {
    cities[i  ] = Console.ReadLine();
} while(cities[i-1].Length>1 && i<50);

Keep entering cities until i reaches 50 or user sends an empty string.

To output cities only containing 'E' or 'e' and not cities containing 'r':

foreach(var city in cities)
{
    if((city.Contains("e") || city.Contains("E")) && !city.Contains("r"))
        Console.WriteLine(city);
}

You need to count the number E or e occurs in the city-string, but I leave that as a task for you to figure out. I hope this is helpful on your path to the solution.

CodePudding user response：

We can print a string in C using puts(), printf(), for loop, and recursion method. We have to pass a string character array name in the puts() function as an argument to print the string in the console. We can use the %s format specifier in the printf() function to print the character array in the console.