anonymous
  • anonymous
Please define Recursion Function in C++.
Computer Science
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chestercat
  • chestercat
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anonymous
  • anonymous
@ash2326 @AwkwardsWhatIAmFor @ash__arya @ByteMe @bballer100 @bluesgut @Captain_Page_Turner @Chris2332 @comphw @DHASHNI @devendra_iiti
anonymous
  • anonymous
recursion is when a function calls itself.That is, in the course of the function definition there is a call to that very same function. At first this may seem like a never ending loop, or like a dog chasing its tail. It can never catch it. So too it seems our function will never finish. This might be true is some cases, but in practice we can check to see if a certain condition is true and in that case exit (return from) our function. The case in which we end our recursion is called a base case . Additionally, just as in a loop, we must change some value and incrementally advance closer to our base case.
anonymous
  • anonymous
http://www.danzig.us/cpp/recursion.html

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anonymous
  • anonymous
@surdawi @SWAG @sue101
anonymous
  • anonymous
Hi, how did you find the replies by DHASHNI?
anonymous
  • anonymous
y so ...
anonymous
  • anonymous
because he tagged another 3 people after the reply... which seems a bit weird!
anonymous
  • anonymous
thats ok!!!!
anonymous
  • anonymous
well if he's not satisfied with my idea ..... he should shift is'nt it!!!!
anonymous
  • anonymous
Explain further I understood little bit I need more explanation.... @DHASHNI @ash2326 @AwkwardsWhatIAmFor @ash__arya @hartnn @kropot72 @LonelyandForgotten
anonymous
  • anonymous
#include void recurse ( int count ) /* Each call gets its own copy of count */ { printf( "%d\n", count ); /* It is not necessary to increment count since each function's variables are separate (so each count will be initialized one greater) */ recurse ( count + 1 ); } int main() { recurse ( 1 ); /* First function call, so it starts at one */ return 0; } ====>>> This simple program will show the number of times the recurse function has been called by initializing each individual function call's count variable one greater than it was previous by passing in count + 1. Keep in mind that it is not a function call restarting itself; it is hundreds of function calls that are each unfinished. The best way to think of recursion is that each function call is a "process" being carried out by the computer. If we think of a program as being carried out by a group of people who can pass around information about the state of a task and instructions on performing the task, each recursive function call is a bit like each person asking the next person to follow the same set of instructions on some part of the task while the first person waits for the result. At some point, we're going to run out of people to carry out the instructions, just as our previous recursive functions ran out of space on the stack. There needs to be a way to avoid this! To halt a series of recursive calls, a recursive function will have a condition that controls when the function will finally stop calling itself. The condition where the function will not call itself is termed the base case of the function. Basically, it will usually be an if-statement that checks some variable for a condition (such as a number being less than zero, or greater than some other number) and if that condition is true, it will not allow the function to call itself again. (Or, it could check if a certain condition is true and only then allow the function to call itself)

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