---
name: "ftofix"
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/ftofix/3alleg4"
---

# ftofix(3alleg4)

Converts a floating point value to fixed point. Allegro game programming library.

## NAME

ftofix - Converts a floating point value to fixed point. Allegro game programming library.

## SYNOPSIS

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

**fixed ftofix(double x);**

## DESCRIPTION

Converts a floating point value to fixed point. Unlike itofix(), this function clamps values which could overflow the type conversion, setting \`errno' to ERANGE in the process if this happens. Example:

```
   fixed number;
   number = itofix(-40000);
   ASSERT(fixfloor(number) == -32768);
   number = itofix(64000);
   ASSERT(fixfloor(number) == 32767);
   ASSERT(!errno); /* This will fail. */
```

## RETURN VALUE

Returns the value of the floating point value converted to fixed point clamping overflows (and setting \`errno').

## SEE ALSO

**fixtof**(3alleg4), **itofix**(3alleg4), **fixtoi**(3alleg4), **exfixed**(3alleg4), **exrotscl**(3alleg4), **exspline**(3alleg4), **exupdate**(3alleg4)