C difficulty recursion

Question

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.
); } else { printf(%d bottles of beer on the wall. %d bottles of beer.
 numberOfBottles numberOfBottles); int oneFewer = numberOfBottles - 1; printf(Take one down pass it around %d bottles of beer on the wall.
 oneFewer); singTheSong(oneFewer); // This function calls itself! printf(Put a bottle in the recycling %d empty bottles in the bin.
 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.
 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.

Dhanapal Chandran · Answer

This is recursive call happening until it reaches count o. This code is not reachable as per logic printf(Put a bottle in the recycling %d empty bottles in the bin.
 numberOfBottles);. So it start from 98 and print till 0

Dhanapal Chandran · Answer

Got the problem please find the explanation in the following link https://www.google.com/amp/s/takeuforward.org/data-structure/print-n-to-1-and-1-to-n-using-recursion/%3Famp=1 Printed output /tmp/BmyDsKtoob.o Hello world99 bottles of beer on the wall. 99 bottles of beer. Take one down pass it around 98 bottles of beer on the wall. 98 bottles of beer on the wall. 98 bottles of beer. Take one down pass it around 97 bottles of beer on the wall. 97 bottles of beer on the wall. 97 bottles of beer. Take one down pass it around 96 bottles of beer on the wall. 96 bottles of beer on the wall. 96 bottles of beer. Take one down pass it around 95 bottles of beer on the wall. 95 bottles of beer on the wall. 95 bottles of beer. Take one down pass it around 94 bottles of beer on the wall. 94 bottles of beer on the wall. 94 bottles of beer. Take one down pass it around 93 bottles of beer on the wall. 93 bottles of beer on the wall. 93 bottles of beer. Take one down pass it around 92 bottles of beer on the wall. 92 bottles of beer on the wall. 92 bottles of beer. Take one down pass it around 91 bottles of beer on the wall. 91 bottles of beer on the wall. 91 bottles of beer. Take one down pass it around 90 bottles of beer on the wall. 90 bottles of beer on the wall. 90 bottles of beer. Take one down pass it around 89 bottles of beer on the wall. 89 bottles of beer on the wall. 89 bottles of beer. Take one down pass it around 88 bottles of beer on the wall. 88 bottles of beer on the wall. 88 bottles of beer. Take one down pass it around 87 bottles of beer on the wall. 87 bottles of beer on the wall. 87 bottles of beer. Take one down pass it around 86 bottles of beer on the wall. 86 bottles of beer on the wall. 86 bottles of beer. Take one down pass it around 85 bottles of beer on the wall. 85 bottles of beer on the wall. 85 bottles of beer. Take one down pass it around 84 bottles of beer on the wall. 84 bottles of beer on the wall. 84 bottles of beer. Take one down pass it around 83 bottles of beer on the wall. 83 bottles of beer on the wall. 83 bottles of beer. Take one down pass it around 82 bottles of beer on the wall. 82 bottles of beer on the wall. 82 bottles of beer. Take one down pass it around 81 bottles of beer on the wall. 81 bottles of beer on the wall. 81 bottles of beer. Take one down pass it around 80 bottles of beer on the wall. 80 bottles of beer on the wall. 80 bottles of beer. Take one down pass it around 79 bottles of beer on the wall. 79 bottles of beer on the wall. 79 bottles of beer. Take one down pass it around 78 bottles of beer on the wall. 78 bottles of beer on the wall. 78 bottles of beer. Take one down pass it around 77 bottles of beer on the wall. 77 bottles of beer on the wall. 77 bottles of beer. Take one down pass it around 76 bottles of beer on the wall. 76 bottles of beer on the wall. 76 bottles of beer. Take one down pass it around 75 bottles of beer on the wall. 75 bottles of beer on the wall. 75 bottles of beer. Take one down pass it around 74 bottles of beer on the wall. 74 bottles of beer on the wall. 74 bottles of beer. Take one down pass it around 73 bottles of beer on the wall. 73 bottles of beer on the wall. 73 bottles of beer. Take one down pass it around 72 bottles of beer on the wall. 72 bottles of beer on the wall. 72 bottles of beer. Take one down pass it around 71 bottles of beer on the wall. 71 bottles of beer on the wall. 71 bottles of beer. Take one down pass it around 70 bottles of beer on the wall. 70 bottles of beer on the wall. 70 bottles of beer. Take one down pass it around 69 bottles of beer on the wall. 69 bottles of beer on the wall. 69 bottles of beer. Take one down pass it around 68 bottles of beer on the wall. 68 bottles of beer on the wall. 68 bottles of beer. Take one down pass it around 67 bottles of beer on the wall. 67 bottles of beer on the wall. 67 bottles of beer. Take one down pass it around 66 bottles of beer on the wall. 66 bottles of beer on the wall. 66 bottles of beer. Take one down pass it around 65 bottles of beer on the wall. 65 bottles of beer on the wall. 65 bottles of beer. Take one down pass it around 64 bottles of beer on the wall. 64 bottles of beer on the wall. 64 bottles of beer. Take one down pass it around 63 bottles of beer on the wall. 63 bottles of beer on the wall. 63 bottles of beer. Take one down pass it around 62 bottles of beer on the wall. 62 bottles of beer on the wall. 62 bottles of beer. Take one down pass it around 61 bottles of beer on the wall. 61 bottles of beer on the wall. 61 bottles of beer. Take one down pass it around 60 bottles of beer on the wall. 60 bottles of beer on the wall. 60 bottles of beer. Take one down pass it around 59 bottles of beer on the wall. 59 bottles of beer on the wall. 59 bottles of beer. Take one down pass it around 58 bottles of beer on the wall. 58 bottles of beer on the wall. 58 bottles of beer. Take one down pass it around 57 bottles of beer on the wall. 57 bottles of beer on the wall. 57 bottles of beer. Take one down pass it around 56 bottles of beer on the wall. 56 bottles of beer on the wall. 56 bottles of beer. Take one down pass it around 55 bottles of beer on the wall. 55 bottles of beer on the wall. 55 bottles of beer. Take one down pass it around 54 bottles of beer on the wall. 54 bottles of beer on the wall. 54 bottles of beer. Take one down pass it around 53 bottles of beer on the wall. 53 bottles of beer on the wall. 53 bottles of beer. Take one down pass it around 52 bottles of beer on the wall. 52 bottles of beer on the wall. 52 bottles of beer. Take one down pass it around 51 bottles of beer on the wall. 51 bottles of beer on the wall. 51 bottles of beer. Take one down pass it around 50 bottles of beer on the wall. 50 bottles of beer on the wall. 50 bottles of beer. Take one down pass it around 49 bottles of beer on the wall. 49 bottles of beer on the wall. 49 bottles of beer. Take one down pass it around 48 bottles of beer on the wall. 48 bottles of beer on the wall. 48 bottles of beer. Take one down pass it around 47 bottles of beer on the wall. 47 bottles of beer on the wall. 47 bottles of beer. Take one down pass it around 46 bottles of beer on the wall. 46 bottles of beer on the wall. 46 bottles of beer. Take one down pass it around 45 bottles of beer on the wall. 45 bottles of beer on the wall. 45 bottles of beer. Take one down pass it around 44 bottles of beer on the wall. 44 bottles of beer on the wall. 44 bottles of beer. Take one down pass it around 43 bottles of beer on the wall. 43 bottles of beer on the wall. 43 bottles of beer. Take one down pass it around 42 bottles of beer on the wall. 42 bottles of beer on the wall. 42 bottles of beer. Take one down pass it around 41 bottles of beer on the wall. 41 bottles of beer on the wall. 41 bottles of beer. Take one down pass it around 40 bottles of beer on the wall. 40 bottles of beer on the wall. 40 bottles of beer. Take one down pass it around 39 bottles of beer on the wall. 39 bottles of beer on the wall. 39 bottles of beer. Take one down pass it around 38 bottles of beer on the wall. 38 bottles of beer on the wall. 38 bottles of beer. Take one down pass it around 37 bottles of beer on the wall. 37 bottles of beer on the wall. 37 bottles of beer. Take one down pass it around 36 bottles of beer on the wall. 36 bottles of beer on the wall. 36 bottles of beer. Take one down pass it around 35 bottles of beer on the wall. 35 bottles of beer on the wall. 35 bottles of beer. Take one down pass it around 34 bottles of beer on the wall. 34 bottles of beer on the wall. 34 bottles of beer. Take one down pass it around 33 bottles of beer on the wall. 33 bottles of beer on the wall. 33 bottles of beer. Take one down pass it around 32 bottles of beer on the wall. 32 bottles of beer on the wall. 32 bottles of beer. Take one down pass it around 31 bottles of beer on the wall. 31 bottles of beer on the wall. 31 bottles of beer. Take one down pass it around 30 bottles of beer on the wall. 30 bottles of beer on the wall. 30 bottles of beer. Take one down pass it around 29 bottles of beer on the wall. 29 bottles of beer on the wall. 29 bottles of beer. Take one down pass it around 28 bottles of beer on the wall. 28 bottles of beer on the wall. 28 bottles of beer. Take one down pass it around 27 bottles of beer on the wall. 27 bottles of beer on the wall. 27 bottles of beer. Take one down pass it around 26 bottles of beer on the wall. 26 bottles of beer on the wall. 26 bottles of beer. Take one down pass it around 25 bottles of beer on the wall. 25 bottles of beer on the wall. 25 bottles of beer. Take one down pass it around 24 bottles of beer on the wall. 24 bottles of beer on the wall. 24 bottles of beer. Take one down pass it around 23 bottles of beer on the wall. 23 bottles of beer on the wall. 23 bottles of beer. Take one down pass it around 22 bottles of beer on the wall. 22 bottles of beer on the wall. 22 bottles of beer. Take one down pass it around 21 bottles of beer on the wall. 21 bottles of beer on the wall. 21 bottles of beer. Take one down pass it around 20 bottles of beer on the wall. 20 bottles of beer on the wall. 20 bottles of beer. Take one down pass it around 19 bottles of beer on the wall. 19 bottles of beer on the wall. 19 bottles of beer. Take one down pass it around 18 bottles of beer on the wall. 18 bottles of beer on the wall. 18 bottles of beer. Take one down pass it around 17 bottles of beer on the wall. 17 bottles of beer on the wall. 17 bottles of beer. Take one down pass it around 16 bottles of beer on the wall. 16 bottles of beer on the wall. 16 bottles of beer. Take one down pass it around 15 bottles of beer on the wall. 15 bottles of beer on the wall. 15 bottles of beer. Take one down pass it around 14 bottles of beer on the wall. 14 bottles of beer on the wall. 14 bottles of beer. Take one down pass it around 13 bottles of beer on the wall. 13 bottles of beer on the wall. 13 bottles of beer. Take one down pass it around 12 bottles of beer on the wall. 12 bottles of beer on the wall. 12 bottles of beer. Take one down pass it around 11 bottles of beer on the wall. 11 bottles of beer on the wall. 11 bottles of beer. Take one down pass it around 10 bottles of beer on the wall. 10 bottles of beer on the wall. 10 bottles of beer. Take one down pass it around 9 bottles of beer on the wall. 9 bottles of beer on the wall. 9 bottles of beer. Take one down pass it around 8 bottles of beer on the wall. 8 bottles of beer on the wall. 8 bottles of beer. Take one down pass it around 7 bottles of beer on the wall. 7 bottles of beer on the wall. 7 bottles of beer. Take one down pass it around 6 bottles of beer on the wall. 6 bottles of beer on the wall. 6 bottles of beer. Take one down pass it around 5 bottles of beer on the wall. 5 bottles of beer on the wall. 5 bottles of beer. Take one down pass it around 4 bottles of beer on the wall. 4 bottles of beer on the wall. 4 bottles of beer. Take one down pass it around 3 bottles of beer on the wall. 3 bottles of beer on the wall. 3 bottles of beer. Take one down pass it around 2 bottles of beer on the wall. 2 bottles of beer on the wall. 2 bottles of beer. Take one down pass it around 1 bottles of beer on the wall. 1 bottles of beer on the wall. 1 bottles of beer. Take one down pass it around 0 bottles of beer on the wall. There are simply no more bottles of beer on the wall. Put a bottle in the recycling 1 empty bottles in the bin. Put a bottle in the recycling 2 empty bottles in the bin. Put a bottle in the recycling 3 empty bottles in the bin. Put a bottle in the recycling 4 empty bottles in the bin. Put a bottle in the recycling 5 empty bottles in the bin. Put a bottle in the recycling 6 empty bottles in the bin. Put a bottle in the recycling 7 empty bottles in the bin. Put a bottle in the recycling 8 empty bottles in the bin. Put a bottle in the recycling 9 empty bottles in the bin. Put a bottle in the recycling 10 empty bottles in the bin. Put a bottle in the recycling 11 empty bottles in the bin. Put a bottle in the recycling 12 empty bottles in the bin. Put a bottle in the recycling 13 empty bottles in the bin. Put a bottle in the recycling 14 empty bottles in the bin. Put a bottle in the recycling 15 empty bottles in the bin. Put a bottle in the recycling 16 empty bottles in the bin. Put a bottle in the recycling 17 empty bottles in the bin. Put a bottle in the recycling 18 empty bottles in the bin. Put a bottle in the recycling 19 empty bottles in the bin. Put a bottle in the recycling 20 empty bottles in the bin. Put a bottle in the recycling 21 empty bottles in the bin. Put a bottle in the recycling 22 empty bottles in the bin. Put a bottle in the recycling 23 empty bottles in the bin. Put a bottle in the recycling 24 empty bottles in the bin. Put a bottle in the recycling 25 empty bottles in the bin. Put a bottle in the recycling 26 empty bottles in the bin. Put a bottle in the recycling 27 empty bottles in the bin. Put a bottle in the recycling 28 empty bottles in the bin. Put a bottle in the recycling 29 empty bottles in the bin. Put a bottle in the recycling 30 empty bottles in the bin. Put a bottle in the recycling 31 empty bottles in the bin. Put a bottle in the recycling 32 empty bottles in the bin. Put a bottle in the recycling 33 empty bottles in the bin. Put a bottle in the recycling 34 empty bottles in the bin. Put a bottle in the recycling 35 empty bottles in the bin. Put a bottle in the recycling 36 empty bottles in the bin. Put a bottle in the recycling 37 empty bottles in the bin. Put a bottle in the recycling 38 empty bottles in the bin. Put a bottle in the recycling 39 empty bottles in the bin. Put a bottle in the recycling 40 empty bottles in the bin. Put a bottle in the recycling 41 empty bottles in the bin. Put a bottle in the recycling 42 empty bottles in the bin. Put a bottle in the recycling 43 empty bottles in the bin. Put a bottle in the recycling 44 empty bottles in the bin. Put a bottle in the recycling 45 empty bottles in the bin. Put a bottle in the recycling 46 empty bottles in the bin. Put a bottle in the recycling 47 empty bottles in the bin. Put a bottle in the recycling 48 empty bottles in the bin. Put a bottle in the recycling 49 empty bottles in the bin. Put a bottle in the recycling 50 empty bottles in the bin. Put a bottle in the recycling 51 empty bottles in the bin. Put a bottle in the recycling 52 empty bottles in the bin. Put a bottle in the recycling 53 empty bottles in the bin. Put a bottle in the recycling 54 empty bottles in the bin. Put a bottle in the recycling 55 empty bottles in the bin. Put a bottle in the recycling 56 empty bottles in the bin. Put a bottle in the recycling 57 empty bottles in the bin. Put a bottle in the recycling 58 empty bottles in the bin. Put a bottle in the recycling 59 empty bottles in the bin. Put a bottle in the recycling 60 empty bottles in the bin. Put a bottle in the recycling 61 empty bottles in the bin. Put a bottle in the recycling 62 empty bottles in the bin. Put a bottle in the recycling 63 empty bottles in the bin. Put a bottle in the recycling 64 empty bottles in the bin. Put a bottle in the recycling 65 empty bottles in the bin. Put a bottle in the recycling 66 empty bottles in the bin. Put a bottle in the recycling 67 empty bottles in the bin. Put a bottle in the recycling 68 empty bottles in the bin. Put a bottle in the recycling 69 empty bottles in the bin. Put a bottle in the recycling 70 empty bottles in the bin. Put a bottle in the recycling 71 empty bottles in the bin. Put a bottle in the recycling 72 empty bottles in the bin. Put a bottlein the recycling 73 empty bottles in the bin. Put a bottle in the recycling 74 empty bottles in the bin. Put a bottle in the recycling 75 empty bottles in the bin. Put a bottle in the recycling 76 empty bottles in the bin. Put a bottle in the recycling 77 empty bottles in the bin. Put a bottle in the recycling 78 empty bottles in the bin. Put a bottle in the recycling 79 empty bottles in the bin. Put a bottle in the recycling 80 empty bottles in the bin. Put a bottle in the recycling 81 empty bottles in the bin. Put a bottle in the recycling 82 empty bottles in the bin. Put a bottle in the recycling 83 empty bottles in the bin. Put a bottle in the recycling 84 empty bottles in the bin. Put a bottle in the recycling 85 empty bottles in the bin. Put a bottle in the recycling 86 empty bottles in the bin. Put a bottle in the recycling 87 empty bottles in the bin. Put a bottle in the recycling 88 empty bottles in the bin. Put a bottle in the recycling 89 empty bottles in the bin. Put a bottle in the recycling 90 empty bottles in the bin. Put a bottle in the recycling 91 empty bottles in the bin. Put a bottle in the recycling 92 empty bottles in the bin. Put a bottle in the recycling 93 empty bottles in the bin. Put a bottle in the recycling 94 empty bottles in the bin. Put a bottle in the recycling 95 empty bottles in the bin. Put a bottle in the recycling 96 empty bottles in the bin. Put a bottle in the recycling 97 empty bottles in the bin. Put a bottle in the recycling 98 empty bottles in the bin. Put a bottle in the recycling 99 empty bottles in the bin.

horald Henry · Answer

I don't understand. It's increasing from 0 to 98 and you're saying it decreases. So it can be done like this example? int oneFewer = numberOfBottles - 1;