data<\/a> typ pou\u017e\u00edvan\u00fd v po\u010d\u00edta\u010dov\u00e9m programov\u00e1n\u00ed k reprezentaci re\u00e1ln\u00fdch \u010d\u00edsel s \u0161irok\u00fdm rozsahem velikost\u00ed a p\u0159esnost\u00ed. Jedn\u00e1 se o bin\u00e1rn\u00ed reprezentaci v\u011bdeck\u00e9ho z\u00e1pisu, kter\u00e1 se skl\u00e1d\u00e1 ze znam\u00e9nkov\u00e9ho bitu, mantisy a exponentu. Mantisa p\u0159edstavuje v\u00fdznamn\u00e9 \u010d\u00edslice \u010d\u00edsla, zat\u00edmco exponent p\u0159edstavuje velikost \u010d\u00edsla.<\/p>\n\u010c\u00edsla s pohyblivou \u0159\u00e1dovou \u010d\u00e1rkou se pou\u017e\u00edvaj\u00ed v \u0159ad\u011b aplikac\u00ed, v\u010detn\u011b v\u011bdeck\u00fdch simulac\u00ed, finan\u010dn\u00edch v\u00fdpo\u010dt\u016f a po\u010d\u00edta\u010dov\u00e9 grafiky. Jsou nezbytn\u00e1 pro reprezentaci hodnot, kter\u00e9 nelze p\u0159esn\u011b reprezentovat pomoc\u00ed cel\u00fdch \u010d\u00edsel, jako jsou iracion\u00e1ln\u00ed \u010d\u00edsla a desetinn\u00e9 zlomky.<\/p>\n
Jednou z hlavn\u00edch v\u00fdhod \u010d\u00edsel s pohyblivou \u0159\u00e1dovou \u010d\u00e1rkou je jejich schopnost reprezentovat \u0161irok\u00fd rozsah hodnot s relativn\u011b mal\u00fdm objemem pam\u011bti. Nejsou v\u0161ak v\u017edy p\u0159esn\u00e1 a p\u0159i v\u00fdpo\u010dtech s \u010d\u00edsly s pohyblivou \u0159\u00e1dovou \u010d\u00e1rkou m\u016f\u017ee doch\u00e1zet k chyb\u00e1m p\u0159i zaokrouhlov\u00e1n\u00ed. Tyto chyby se mohou \u010dasem kumulovat a v\u00e9st k nep\u0159esnostem ve v\u00fdpo\u010dtech.<\/p>\n
Existuje n\u011bkolik r\u016fzn\u00fdch form\u00e1t\u016f s plovouc\u00ed desetinnou \u010d\u00e1rkou, v\u010detn\u011b form\u00e1t\u016f s jednoduchou a dvojitou p\u0159esnost\u00ed. \u010c\u00edsla s plovouc\u00ed desetinnou \u010d\u00e1rkou s jednoduchou p\u0159esnost\u00ed pou\u017e\u00edvaj\u00ed k reprezentaci \u010d\u00edsla 32 bit\u016f, zat\u00edmco \u010d\u00edsla s plovouc\u00ed desetinnou \u010d\u00e1rkou s dvojn\u00e1sobnou p\u0159esnost\u00ed pou\u017e\u00edvaj\u00ed 64 bit\u016f. Volba form\u00e1tu z\u00e1vis\u00ed na aplikaci a po\u017eadovan\u00e9 \u00farovni p\u0159esnosti.<\/p>\n
Celkov\u011b jsou \u010d\u00edsla s pohyblivou \u0159\u00e1dovou \u010d\u00e1rkou mocn\u00fdm n\u00e1strojem pro reprezentaci re\u00e1ln\u00fdch \u010d\u00edsel v po\u010d\u00edta\u010dov\u00e9m programov\u00e1n\u00ed. I kdy\u017e nejsou v\u017edy p\u0159esn\u00e1, jsou pro mnoho aplikac\u00ed nezbytn\u00e1 a lze je efektivn\u011b pou\u017e\u00edvat s pe\u010dliv\u00fdm uv\u00e1\u017een\u00edm jejich omezen\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"
Seznamte se s univerz\u00e1ln\u00edm datov\u00fdm typem, kter\u00fd se v po\u010d\u00edta\u010dov\u00e9m programov\u00e1n\u00ed pou\u017e\u00edv\u00e1 k reprezentaci re\u00e1ln\u00fdch \u010d\u00edsel r\u016fzn\u00fdch velikost\u00ed a p\u0159esnost\u00ed - Floating Point.<\/p>","protected":false},"template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-6586","dictionary","type-dictionary","status-publish","hentry"],"acf":[],"yoast_head":"\n
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