Please help me to correct my code

Question

Recursive void function that print hello ntimes
https://code.sololearn.com/czE7WqmwJ5aS/?ref=app

Answer 1

If you reached zero, you have to abort the function:

void count(int n){
if (n==0) {
printf("there is nothing");
return;
}
else
printf("hello\n");
count(n-1);
}

Answer 2

count(n-1) for decrement n and output "hello" until n=0

Answer 3

You are welcome 😊

Answer 4

void count(int n){
if (n==0)
printf("there is nothing");
else
{
printf("hello\n");
count(n-1);

}
}
int main(){
int n;
printf("entrer an integer :\n");
scanf("%d",&n);
printf("we have :\n");
count(n);
}

Answer 5

You can't print a void function.
Just call the function because you have all print statements inside the function.

if(n == 0) after printf() you should also stop the function otherwise you will get an infinite loop.

Answer 6

Thanks guys

Answer 7

How can I stop the function because I dropped in infinite loop
Hello hello.......

Answer 8

Why please count (n-1)

Answer 9

##Are we should change the parameters while we are calling the recursive function
Can we write count(n+1)
##So what the difference between count (n-1) and count (n+1)
##is the purpose only to avoid infinite loop

Answer 10

There are all sorts of recursive functions, but they have one thing in common:

They need to have a base case, that determines when they should stop.

Here the base case is (if n==0).

So if n wouldn't decrease, the recursion would never end.

If the base case was (if n>=1000), you could use (n+1) as well, but then (n-1) would be wrong (unless you'd start with n>=1000 of course 😉).