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using the new[] operator

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cout << "Enter a string" << end;
cin >> <---- i want to use new to allocate as many character bytes at the string's size how would i do this?


for example if string is "hello" i want to use the new operator to store dynamically 6 bytes for this string...and then store each byte in this string so i can manipulate it :) -thx for help/direction

i understand i need to use the new[] operator...i'm just unsure how to use it for the situation as for i don't use it much!

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Also, it sounds like youre wanting to manipulate individual characters.

in the example above, you can use theString.length() to get the length in characters or to address an individual character use theString[n] where n is the character number you want to access, between 0 and length() - 1.

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You cannot know the length of the string in advance. You can make a buffer of some size to start, and read characters until it fills up. At that point, you allocate a larger one (say twice the size), copy the contents of the old one, delete the old one and keep going.

So you basically need an object that has:
* a `char *' where the data is stored,
* an integer indicating the length of the string, and
* an integer indicating the size of the buffer currently allocated.

You can then make a method to append a character, which will regrow the buffer if needed. Finally you'll make a function that reads characters from a stream and appends them to this object.

Or you can use std::string which already implements precisely this.

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This topic is 2636 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

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