---
title: "strcmp | open.mp"
description: "Compares two strings to see if they are the same."
canonical: https://omp.itsneufox.com/th/docs/scripting/functions/strcmp
language: th
---

# strcmp

## คำอธิบาย

Compares two strings to see if they are the same.

| Name | Description |
| --- | --- |
| string1 | The first string to compare. |
| string2 | The second string to compare. |
| 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. |

## ส่งคืน

0 if strings match each other on given length;1 o r -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.

## ตัวอย่าง

```c
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
```

## บันทึก

warning

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.

## ฟังก์ชั่นที่เกี่ยวข้องกัน

-   strfind: Search for a string in another string.
-   strtok: Get the next 'token' (word/parameter) in a string.
-   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.