Sign of Money Amount (The GNU C Library)

#### 7.7.1.3 Printing the Sign of a Monetary Amount ¶

These members of the `struct lconv` structure specify how to print the sign (if any) of a monetary value.

`char *positive_sign`
`char *negative_sign`

  These are strings used to indicate positive (or zero) and negative monetary quantities, respectively.

  In the standard ‘`C`’ locale, both of these members have a value of `""` (the empty string), meaning “unspecified”.

  The ISO standard doesn’t say what to do when you find this value; we recommend printing `positive_sign` as you find it, even if it is empty. For a negative value, print `negative_sign` as you find it unless both it and `positive_sign` are empty, in which case print ‘`-`’ instead. (Failing to indicate the sign at all seems rather unreasonable.)

`char p_sign_posn`
`char n_sign_posn`
`char int_p_sign_posn`
`char int_n_sign_posn`

  These members are small integers that indicate how to position the sign for nonnegative and negative monetary quantities, respectively. (The string used for the sign is what was specified with `positive_sign` or `negative_sign`.) The possible values are as follows:

  `0`

    The currency symbol and quantity should be surrounded by parentheses.

  `1`

    Print the sign string before the quantity and currency symbol.

  `2`

    Print the sign string after the quantity and currency symbol.

  `3`

    Print the sign string right before the currency symbol.

  `4`

    Print the sign string right after the currency symbol.

  `CHAR_MAX`

    “Unspecified”. Both members have this value in the standard ‘`C`’ locale.

  The ISO standard doesn’t say what you should do when the value is `CHAR_MAX`. We recommend you print the sign after the currency symbol.

  The members with the `int_` prefix apply to the `int_curr_symbol` while the other two apply to `currency_symbol`.