I used the debugger to examine this code but not understanding a couple areas.
int main(void)
{
int height = get_int("Height: ");
draw(height);
}
void draw(int n)
{
if (n <= 0)
{
return;
}
draw(n - 1);
for (int i = 0; i < n; i++)
{
printf("#");
}
printf("\n");
}
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Recursion is much easier to understand if you use
goto
instead of functions. Functions are a high level concept in the C language (and most other languages) but it gets compiled down to (essentially) the oldergoto
style of programming which is much easier to understand.goto 42
will move execution to line 42 of the code.goto x
will move to the line of code labeledx
.Most modern languages don’t even have
goto
support, since functions are cleaner and tend to produce more easily maintained code, however as a programmer you should be aware what’s going on under the hood. Here’s your code rewritten to usegoto
:PS:
goto
is also howfor
loops,if
statements,switch
blocks and others work under the hood.