Espaços nominais
Variantes
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std::ceil

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< cpp‎ | numeric‎ | math

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C++
 
Biblioteca numéricos
Funções matemáticas comuns
De ponto flutuante ambiente
Números complexos
Matrizes numéricas
Pseudo-aleatório de geração de números
Tempo de compilação aritmética racional (C++11)
Genéricos operações numéricas
Original:
Generic numeric operations
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Funções matemáticas comuns
Funções
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Functions
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Operações básicas
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Basic operations
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Funções exponenciais
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Exponential functions
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Funções de poder
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Power functions
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Funções trigonométricas e hiperbólicas
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Trigonometric and hyperbolic functions
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Erro e funções gamma
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Error and gamma functions
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Número inteiro mais próximo de operações de ponto flutuante
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Nearest integer floating point operations
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ceil
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Flutuando funções de manipulação de pontos
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Floating point manipulation functions
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Classificação / Comparação
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Classification/Comparison
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Constantes de macros
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Macro constants
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Definido no cabeçalho <cmath>
float       ceil( float arg );
double      ceil( double arg );
long double ceil( long double arg );
double      ceil( Integral arg );
 (desde C++11)
Calcula número inteiro mais próximo, pelo menos, arg.
Original:
Computes nearest integer not less than arg.
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Índice

[editar] Parâmetros

arg -
flutuando valor de ponto
Original:
floating point value
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[editar] Valor de retorno

Número inteiro mais próximo, pelo menos, arg
Original:
Nearest integer not less than arg
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[[Image:
Valor de retorno
Original:
{{{2}}}
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|200x200px]]
Argument

[editar] Notas

Se o argumento é infinito (positivo ou negativo) ou zero (positivo ou negativo), o valor de retorno é o mesmo que o argumento.
Original:
If the argument is infinity (positive or negative) or zero (positive or negative), the return value is the same as the argument.
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Os maiores representáveis ​​valores de ponto flutuante são inteiros exatos em todos os padrões de formatos de ponto flutuante, por isso nunca esta função transborda.
Original:
The largest representable floating-point values are exact integers in all standard floating-point formats, so this function never overflows.
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Esta função pode, mas não é obrigado a, aumentar FE_INEXACT exceções de ponto flutuante para argumentos não inteiros.
Original:
This function may, but is not required to, raise FE_INEXACT floating-point exceptions for non-integer arguments.
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[editar] Exemplo

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

Saída: 

12.000000
13.000000
13.000000
13.000000
13.000000

[editar] Veja também
número inteiro mais próximo não maior do que o valor especificado
Original:
nearest integer not greater than the given value
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(função) [edit]
(C++11)
número inteiro mais próximo não maior em magnitude do que o valor dado
Original:
nearest integer not greater in magnitude than the given value
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(função) [edit]
(C++11)
(C++11)
(C++11)
número inteiro mais próximo de arredondamento, de zero em casos meio
Original:
nearest integer, rounding away from zero in halfway cases
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(função) [edit]
(C++11)
(C++11)
(C++11)
número inteiro mais próximo usando o modo de arredondamento atual com exceção
se o resultado é diferente
Original:
nearest integer using current rounding mode with
exception if the result differs
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(função) [edit]
(C++11)
número inteiro mais próximo utilizando o modo de arredondamento correntes
Original:
nearest integer using current rounding mode
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(função) [edit]
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