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#include <ctype.h>.sp int toupper (int c); int tolower (int c);
In manchen Umgebungen existieren auch Kleinbuchstaben, die keinen zugehörigen Grösbuchstaben haben , das deutsche ß z.B.
| 1. Juli 1996 | TOUPPER (3) | GNU |
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| “ | Like a classics radio station whose play list spans decades, Unix simultaneously exhibits its mixed and dated heritage. There's Clash-era graphics interfaces; Beatles-era two-letter command names; and systems programs (for example, ps) whose terse and obscure output was designed for slow teletypes; Bing Crosby-era command editing (# and @ are still the default line editing commands), and Scott Joplin-era core dumps. | ” |
| — The Unix Haters' handbook | ||