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std::floor

Da cppreference.com.
< cpp‎ | numeric‎ | math

 
 
Numeri libreria
Comuni funzioni matematiche
Virgola mobile ambiente
I numeri complessi
Array numerici
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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
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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)
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Funzioni esponenziali
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Exponential functions
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exp
exp2(C++11)
expm1(C++11)
log
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Funzioni di risparmio energia
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Power functions
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sqrt
cbrt(C++11)
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sinh
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erf(C++11)
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lgamma(C++11)
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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
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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
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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)
 
Defined in 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) [edit]
(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) [edit]
(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) [edit]