strcmp
warning
This function starts with a lowercase letter.
Description
Compares two strings to see if they are the same.
| Name | Description |
|---|---|
| const string1[] | The first string to compare. |
| const string2[] | The second string to compare. |
| bool:ignorecase (optional) | When set to true, the case doesn't matter - HeLLo is the same as Hello. When false, they're not the same. |
| length (optional) | When this length is set, the first x chars will be compared - doing "Hello" and "Hell No" with a length of 4 will say it's the same string. |
Returns
0 if strings match each other on given length.
1 or -1 if some character do not match: string1[i] - string2[i] ('i' represents character index starting from 0)
difference in number of characters if one string matches only part of another string.
Examples
new string1[] = "Hello World";
new string2[] = "Hello World";
// Check if the strings are the same
if (!strcmp(string1, string2))
new string3[] = "Hell";
// Check if the first 4 characters match
if (!strcmp(string2, string3, false, 4))
// Check for null strings with isnull()
if (!strcmp(string1, string2) && !isnull(string1) && !isnull(string2))
// Definition for isnull():
#if !defined isnull
#define isnull(%1) ((!(%1[0])) || (((%1[0]) == '\1') && (!(%1[1]))))
#endif
Notes
warning
-
This function returns 0 if either string is empty. Check for null strings with
isnull(). -
If you compare strings from a text file, you should take in to account the 'carriage return' and 'new line' special characters (
\r\n), as they are included, when using fread.
Related Functions
- strfind: Search for a string in another string.
- strequal: Compares two strings to see if they are the same.
- strdel: Delete part of a string.
- strins: Insert text into a string.
- strlen: Get the length of a string.
- strmid: Extract part of a string into another string.
- strpack: Pack a string into a destination string.
- strval: Convert a string into an integer.
- strcat: Concatenate two strings into a destination reference.