Why is the code is not removing “u” from the input string?

Question

I am learning C++. Today I have written a code to remove vowels form a string. It works fine in some tests. But this test is failing to remove "u" from a string. M

Answer 1

When you erase a character, your index i is still being incremented, which means you are skipping checking characters that appear right after a vowel.

You need to decrement i when you erase a character:

if (word[i] == 'a' || word[i] == 'e' || word[i] == 'i' || word[i] == 'o' || word[i] == 'u')
{
    word.erase(word.begin() + i);  // Removing specific character
    --i;  // make sure to check the next character
}

Here's a demo.

Also, please avoid the following 2 lines:

#include 
using namespace std;

They are dangerous and should not be used.