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cpp/numeric/math/floor: differenze tra le versioni

Da cppreference.com.
< cpp‎ | numeric‎ | math
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{{cpp/title|floor}}
 
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float      floor( float arg );
 
float      floor( float arg );
 
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double      floor( double arg );
 
double      floor( double arg );
 
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long double floor( long double arg );
 
long double floor( long double arg );
 
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double      floor( Integral arg );
 
double      floor( Integral arg );
 
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{{tr|Calcola intera più vicina non superiore a {{tt|arg}}. |Computes nearest integer not greater than {{tt|arg}}. }}
 
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===Parametri===
 
===Parametri===
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===Valore di ritorno===
 
===Valore di ritorno===
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[[de:cpp/numeric/math/floor]]
 
[[de:cpp/numeric/math/floor]]

Versione attuale delle 14:37, 2 lug 2013

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C++
 
Numeri libreria
Comuni funzioni matematiche
Virgola mobile ambiente
I numeri complessi
Array numerici
Pseudo-casuale generazione
In fase di compilazione aritmetica razionale (C++11)
Generici operazioni numeriche
Original:
Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Comuni funzioni matematiche
Funzioni
Original:
Functions
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Operazioni di base
Original:
Basic operations
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remainder(C++11)
remquo(C++11)
fma(C++11)
fmax(C++11)
fmin(C++11)
fdim(C++11)
nan
nanf
nanl		(C++11)
(C++11)
(C++11)
Funzioni esponenziali
Original:
Exponential functions
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exp
exp2(C++11)
expm1(C++11)
log
log10
log1p(C++11)
log2(C++11)
Funzioni di risparmio energia
Original:
Power functions
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sqrt
cbrt(C++11)
hypot(C++11)
pow
Funzioni trigonometriche e iperboliche
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Trigonometric and hyperbolic functions
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sinh
cosh
tanh
asinh(C++11)
acosh(C++11)
atanh(C++11)
Errore e gamma funzioni
Original:
Error and gamma functions
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erf(C++11)
erfc(C++11)
lgamma(C++11)
tgamma(C++11)
Più vicini operazioni di interi in virgola mobile
Original:
Nearest integer floating point operations
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ceil
floor
round
lround
llround		(C++11)
(C++11)
(C++11)
trunc(C++11)
nearbyint(C++11)
rint
lrint
llrint		(C++11)
(C++11)
(C++11)
Floating funzioni di manipolazione di punti
Original:
Floating point manipulation functions
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ldexp
scalbn
scalbln		(C++11)
(C++11)
ilogb(C++11)
logb(C++11)
frexp
modf
nextafter
nexttoward		(C++11)
(C++11)
copysign(C++11)
Classificazione / confronto
Original:
Classification/Comparison
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fpclassify(C++11)
isfinite(C++11)
isinf(C++11)
isnan(C++11)
isnormal(C++11)
signbit(C++11)
isgreater(C++11)
isgreaterequal(C++11)
isless(C++11)
islessequal(C++11)
islessgreater(C++11)
isunordered(C++11)
Macro costanti
Original:
Macro constants
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FP_NORMAL
FP_SUBNORMAL
FP_ZERO
FP_INFINITE
FP_NAN		(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
 
Elemento definito nell'header <cmath>
float       floor( float arg );
double      floor( double arg );
long double floor( long double arg );
double      floor( Integral arg );
 (dal C++11)
Calcola intera più vicina non superiore a arg.
Original:
Computes nearest integer not greater than arg.
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Indice

[modifica] Parametri

arg -
valore in virgola mobile
Original:
floating point value
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[modifica] Valore di ritorno

Più vicino intero non superiore a arg
Original:
Nearest integer not greater than arg
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[[Image:
Valore di ritorno
Original:
{{{2}}}
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|200x200px]]
Argument

[modifica] Note

Il valore intero può essere sempre rappresentato dal tipo di dato a virgola mobile.
Original:
The integer value can be always represented by the given floating point type.
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[modifica] Esempio

#include <cmath>
#include <iostream>
 
int main()
{
    std::cout << std::fixed;
    std::cout << std::floor(12.0) << '\n';
    std::cout << std::floor(12.1) << '\n';
    std::cout << std::floor(12.5) << '\n';
    std::cout << std::floor(12.9) << '\n';
    std::cout << std::floor(13.0) << '\n';
}

Output: 

12.000000
12.000000
12.000000
12.000000
13.000000

[modifica] Vedi anche
intero più vicino non inferiore al valore dato
Original:
nearest integer not less than the given value
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(funzione) [modifica]
(C++11)
intera più vicina non superiore in grandezza rispetto al valore dato
Original:
nearest integer not greater in magnitude than the given value
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(funzione) [modifica]
(C++11)
(C++11)
(C++11)
numero intero più vicino, l'arrotondamento a da zero in caso a metà strada
Original:
nearest integer, rounding away from zero in halfway cases
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(funzione) [modifica]
Estratto da "https://it.cppreference.com/mwiki/index.php?title=cpp/numeric/math/floor&oldid=26273"