---
name: "ustrstr"
section: "3alleg4"
platform: "linux"
package: "allegro4-doc"
version: "2:4.4.3.1-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/ustrstr/3alleg4"
---

# ustrstr(3alleg4)

Finds the first occurrence of a string in another one. Allegro game programming library.

## NAME

ustrstr - Finds the first occurrence of a string in another one. Allegro game programming library.

## SYNOPSIS

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

**char \*ustrstr(const char \*s1, const char \*s2);**

## DESCRIPTION

This function finds the first occurrence of string \`s2' in string \`s1'. Example:

```
   char *p = ustrstr("hello world", "world");
```

## RETURN VALUE

Returns a pointer within \`s1', or NULL if \`s2' wasn't found.

## SEE ALSO

**uconvert**(3alleg4), **ustrchr**(3alleg4), **ustrrchr**(3alleg4), **ustrpbrk**(3alleg4), **ustrtok**(3alleg4)