C Test

[Rabelo]

Recently I was questioned about a test in C that I couldn´t find the answer. Can anybody Help me to find it?

...
int i,num = 42;
for (i=0 ; i < num ; i--)
  printf("*");
...

The intent is print 42 *. the question is : "Can you fix this code changing just one character? You can insert OR remove OR change just one character of code. "
i++ would solve the problem ,so certainly it has something with boolean operators... As it was not enougth the problem pointed that there were 3 solutions , how many can you see?
thank you.

[Eli Gassert]

Make num -42

int i, num = -42;

then starting at zero and counting down to -42 will give you 42 *'s

edit: nevermind, I just saw the operator is < and not !=

[rajesh_krec]

1. for(i=0; -i<n; i--)

2. for(i=0; i+n; i--)

3. for(i=0; i<n; n--)

[BabyGuru]

I found 2 of 3 options to solve this problem :
1). add - to the 42 value
so it'll be -42
2). change the < to >

yes yes yes.....

[Eli Gassert]

clever rajesh, nice... 1 and 2 will work just fine, but 3 doesn't work, given the variable name. If the variable name matters ,then that's changing too much. But we'll have to hear back from Rabelo to find out.

[sunnypalsingh]

change i-- to n--

[Rabelo]

wow rajesh_krec !!! Congratulations!!! (the variable name dosen't matter)

Baby Guru: ... ( Just one character....)
Eli Gassert: The first I tried. Doesn´t work because 0 > -42...
sunnypalsingh : Nice shot!!!

I need read more about boolean operators... Anyway I think that it is not a C test, it fits well on an assembler test because i++ would solve the problem without transform the program in a mess for non boolean experts.

Thank you !!