Question

I am new to programming and I have a project in my Algorithm class. What we have to do is decide on a problem and solve it. We haven’t learnt much more than string, char and WriteLine. We did add a couple of things as you will see soon!

I decided that what I want to solve this: The user inserts a word, no matter how long and the program will automatically make the first letter a capital letter. So far this is what I have:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication1
{
class Program
{
    static void Main(string[] args)
    {
    start:
        Console.WriteLine("Please enter a word below:");
        Console.WriteLine("");
        string str = Console.ReadLine();
        char char1;
        if (str[0] >= 97)
        {
            char1 = (char)(str[0] - 32);
        }
        else
        {
            char1 = (char)(str[0] + 32);
        }

        char char2 = (char)(str[1]);
        char char3 = (char)(str[2]);
        char char4 = (char)(str[3]);
        char char5 = (char)(str[4]);
        Console.WriteLine("");
        Console.Write(char1);
        Console.Write(char2);
        Console.Write(char3);
        Console.Write(char4);
        Console.WriteLine(char5);
        goto start;
}
}
}

The problem with that code is that any word with less than 5 letters will make the program crash. Anything with more than 5 letters will just be cut at the fifth letter… I was told that using arrays should solve this problem. Seeing as I am a total newbie at this, I would need this to be broken down and be as simply told as possible!

Any help getting this to work would be very appreciated.

Thanks 🙂

Answer 1

Console.WriteLine("Enter a word:");
string str = Console.ReadLine();
Console.WriteLine(str[0].ToString().ToUpper() + str.Substring(1));

This will work.

Or… if you need to go through the entire string and find the first actual alphabetical character, you can do the following:

Console.WriteLine("Please enter a word:");
string s = Console.ReadLine();
bool found = false;
char[] chars = new char[s.Length];
for (int i = 0; i < s.Length; i++)
{
    if (Char.IsLetter(s[i]) && !found)
    {
         chars[i] = s[i].ToString().ToUpper()[0];
         found = true;
    }
    else
    {
        chars[i] = s[i];
    }
}
s = new String(chars);
Console.WriteLine(s);