how can i use (s+1, n-1, key) where s is string without raising an error?
String manipulation in recursion
@goyalvivek you cannot use s+1 for a string. When s is an array, its holding an address(address of the first character), like a pointer. So when you do s+1 there, it will increment the address and you will reach the next character in the array.
If s was an int variable, doing s+1 would incremement its value.
If s was a char value, doing s+1 would convert the char to its ASCII value, increment the ASCII value and give the corresponding character instead.
Now think about it, if s is a string, what do you expect s+1 to do? Its not holding an address its not an array, its a simple variable holding a bunch of characters. So, this operation is not supported for string datatypes.
I hope you understood why this thing is not possible now.
so for string manipulation i’ll have to take another string in every question and store my answer in it as i iterate the original (input) string right?
@goyalvivek you can manipulate this string also.
For eg if you wish to delete an element in the string, you could use the string::erase(idx, len) function which will remove the elements starting at idx index, upto length len.
I am unable to apply string manipulation in my code, https://ide.codingblocks.com/s/588579 please help me correct it and add comments for more understanding
Got it, couldn’t have explained better. one more question, just like we can delete index/indexes from a string, can we add a char inside a string like VVEK TO ViVEK? in recursion?
Understood! Thanks for ur help.
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