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# C difficulty recursion

Mar 13 2023 1:54 PM

I'd want to ask you a question concerning recursion in the C programming language. I'm reading a c book and came across some code that I didn't fully grasp.

first questions:

``````void singTheSong(int numberOfBottles)
{
if (numberOfBottles == 0)
{
printf("There are simply no more bottles of beer on the wall.\n");
}
else
{
printf("%d bottles of beer on the wall. %d bottles of beer.\n",
numberOfBottles, numberOfBottles);

int oneFewer = numberOfBottles - 1;

printf("Take one down, pass it around, %d bottles of beer on the wall.\n",
oneFewer);

singTheSong(oneFewer); // This function calls itself!

printf("Put a bottle in the recycling, %d empty bottles in the bin.\n",
numberOfBottles);
}
}

int main(int argc, const char * argv[])
{
singTheSong(99);

return 0;
}
``````

So this is meant to be a song. I understand the if clause. I'm not sure how the number goes from 0 to 98.

second question:

``````printf("Put a bottle in the recycling, %d empty bottles in the bin.\n",
numberOfBottles);
``````

Why isn't it increasing to 99? It comes to an end at 98. Please explain in basic English, as I do not speak English as my first language (some difficulties)

According to one of the article I read, everything before singTheSong() is run, and then the recursive call occurs, creating a new stack frame. There will be no recycling print statements until numberOfBottles reaches 0.