Check if char is existing in array

Question

I am creating project in arduino. In C. How can I check if return char is existing in my array?

This is how I want it.

char n[20];
char *adminName[] = {"Jane", "Joe", "James"};

I want to return true if (n) is in my list.

Here is [duplicate](http://stackoverflow.com/questions/1071542/in-c-check-if-a-char-exists-in-a-char-array) — Deepak Ingole, Sep 27 '13 at 08:35
@captain Not really a duplicate of that post, since that post requests a blacklist of characters. There are likely a bunch of others that ask for this, though. — user4815162342, Sep 27 '13 at 09:04

score 3 · Answer 1 · answered Sep 27 '13 at 09:03

3

Loop over array indices and use strcmp(n, adminName[i]) == 0 to test whether the string n is part of the array.

answered Sep 27 '13 at 09:03

user4815162342

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leykan · Answer 2 · 2013-09-28T09:51:45.753

0

you have to use the strcmp() that check the diff between 2 char *

char n[20];
char *adminName[] = {"Jane", "Joe", "James"};
int  i;

i = 0;
while (admminName[i])
 {
    if (strcmp(n, adminName[i]) == 0)
      return (true); 
    i++;
 }
return (false);

edited Sep 28 '13 at 09:51

answered Sep 27 '13 at 09:04

leykan

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The adminName[] array does not have a NULL entry - your while loop will go past the end of the array. – Ross McNab Sep 27 '13 at 10:06

score 0 · Answer 3 · answered Sep 27 '13 at 10:00

0

There are many built in functions are there for this. why cant you use those functions rather than checking manually by loops?

answered Sep 27 '13 at 10:00

sms

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There is a built-in function that searches for a string in an array of strings? Which one? – user4815162342 Sep 27 '13 at 11:50
That sounds like Java or C++, there is no such function in C. – user4815162342 Sep 27 '13 at 12:39

Check if char is existing in array

3 Answers3