---
name: "str_diff"
section: "3diet"
platform: "linux"
package: "libowfat-dev"
version: "0.28-2"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/str_diff/3diet"
---

# str\_diff(3diet)

compare two ASCIIZ strings

## NAME

str\_diff - compare two ASCIIZ strings

## SYNTAX

**#include \<str.h\>**

int **str\_diff**(const char\* *a*,const char\* *b*);

## DESCRIPTION

**str\_diff** returns negative, 0, or positive, depending on whether the string *a*\[0\], *a*\[1\], ..., *a*\[n\]=='\\0' is lexicographically smaller than, equal to, or greater than the string *b*\[0\], *b*\[1\], ..., *b*\[m-1\]=='\\0'.

If the strings are different, str\_diff does not read bytes past the first difference.

## SEE ALSO

[strlen(3)](/strlen/3.md)