Zilog ZUSBOPTS Manual de usuario descargar pdf (Pagina 441)

100

101

UM017105-0511 Standard Functions

Zilog Developer Studio II – ZNEO™

User Manual

413

calloc

Allocates space for an array of nmemb objects, each of whose size is size. The space is

initialized to all bits zero.

Synopsis

#include <stdlib.h>

void *calloc(size_t nmemb, size_t size);

Returns

A pointer to the start (lowest byte address) of the allocated space. If the space cannot be

allocated, or if nmemb or

size is zero, the calloc function returns a null pointer.

Example

char *buf;

buf = (char*)calloc(40, sizeof(char));

if (buf != NULL)

/*success*/

else

/*fail*/

ceil, ceilf

Computes the smallest integer not less than x.

Synopsis

#include <math.h>

double ceil(double x);

float ceilf(float x);

Returns

The smallest integer not less than x, expressed as a double for ceil and expressed as a

float for ceilf.

Example

double y=1.45;

double x;

x=ceil(y);

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Zilog ZUSBOPTS Manual de usuario Pagina 441

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