---
name: "std::ratio_subtract"
section: "3cxx"
platform: "linux"
package: "libstdc++6-4.4-doc"
version: "4.4.7-2"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/std::ratio_subtract"
---

# std::ratio\_subtract(3cxx)

## NAME

std::ratio\_subtract\< \_R1, \_R2 \> -

## SYNOPSIS

### Public Types

typedef **ratio\_add**\< \_R1, **ratio**\
 \<-\_R2::num, \_R2::den \> \>::**type** **type**"\

## Detailed Description

### template\<typename \_R1, typename \_R2\>struct std::ratio\_subtract\< \_R1, \_R2 \>

**ratio\_subtract**

Definition at line 189 of file ratio.

## Author

Generated automatically by Doxygen for libstdc++ from the source code.