std::modf

 

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Defined in header <cmath>
float       modf( float x, float* iptr );
double      modf( double x, double* iptr );
long double modf( long double x, long double* iptr );

Se descompone dado x valor del punto flotante en partes integrales y fraccionarios, cada uno con el mismo tipo y signo como x. La parte integral (en formato de coma flotante) se almacena en el objeto al que apunta iptr .

Original:

Decomposes given floating point value x into integral and fractional parts, each having the same type and sign as x. The integral part (in floating-point format) is stored in the object pointed to by iptr.

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Parámetros

arg	-	flotando valor en puntos Original: floating point value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
iptr	-	puntero al valor de punto flotante para almacenar la parte integral Original: pointer to floating point value to store the integral part to The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valor de retorno

La parte fraccionaria de x con el mismo signo que x. La parte integral se pone en el valor apuntado por iptr .

Original:

The fractional part of x with the same sign as x. The integral part is put into the value pointed to by iptr.

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Ejemplo

#include <iostream>
#include <cmath>
int main()
{
    double f = 123.45;
    double f3;
    double f2 = std::modf(f, &f3);
    std::cout << "Given the number " << f  << ", "
              << "modf() makes " << f3 << " and " << f2 << '\n';
 
    f = -3.21;
    f2 = std::modf(f, &f3);
    std::cout << "Given the number " << f  << ", "
              << "modf() makes " << f3 << " and " << f2 << '\n';
}

Output:

Given the number 123.45, modf() makes 123 and 0.45
Given the number -3.21, modf() makes -3 and -0.21

Ver también

trunc (C++11)	entero más cercano no es mayor en magnitud que el valor dado Original: nearest integer not greater in magnitude than the given value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función)