Zilog ZUSBOPTS Manual do Utilizador descarregar pdf (Página 457)

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101

UM017105-0511 Standard Functions

Zilog Developer Studio II – ZNEO™

User Manual

429

Synopsis

#include <string.h>

void *memset(void *s, int c, size_t n);

Returns

The value of s.

Example

char str[20];

char c='a';

memset(str, c, 10*sizeof(char));

modf, modff

Breaks the argument value into integral and fractional parts, each of which has the same

sign as the argument. It stores the integral part as a

double (modf) or float (modff) in

the object pointed to by iptr.

Synopsis

#include <math.h>

double modf(double value, double *iptr);

float modff(float value, float *iptr);

Returns

The signed fractional part of value.

Example

double x=1.235;

double f;

double i;

i=modf(x, &f);

pow, powf

Computes the x raised to the power of y. A domain error occurs if x is zero and y is less

than or equal to zero, or if x is negative and y is not an integer. A range error can occur.

Synopsis

#include <math.h>

double pow(double x, double y);

float powf(float x, float y);

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