Zilog ZUSBOPTS Bedienungsanleitung PDF herunterladen (Seite 466)

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101

Standard Functions UM017105-0511

438

Zilog Developer Studio II – ZNEO™

User Manual

See the next section, scanf Conversion Characters, for valid input information.

Synopsis

#include <stdio.h>

int scanf(const char *format, ...);

Returns

The value of the macro EOF if an input failure occurs before any conversion. Otherwise,

the

scanf function returns the number of input items assigned, which can be fewer than

provided for, or even zero, in the event of an early conflict between an input character and

the format.

Examples

int i

scanf("%d", &i);

The following example reads in two values. var1 is an unsigned char with two decimal

digits, and

var2 is a float with three decimal place precision.

scanf("%2d,%f",&var1,&var2);

scanf Conversion Characters

d Matches an optionally signed decimal integer, whose format is the same as

expected for the subject sequence of the strtol function with the value 10 for the

base argument. The corresponding argument is a pointer to integer.

i Matches an optionally signed integer, whose format is the same as expected for

the subject sequence of the strtol function with the value 0 for the base argu-

ment. The corresponding argument is a pointer to integer.

o Matches an optionally signed octal integer, whose format is the same as

expected for the subject sequence of the strtol function with the value 8 for the

base argument. The corresponding argument is a pointer to integer.

u Matches an unsigned decimal integer, whose format is the same as expected for

the subject sequence of the strtol function with the value 10 for the base argu-

ment. The corresponding argument is a pointer to unsigned integer.

x Matches an optionally signed hexadecimal integer, whose format is the same as

expected for the subject sequence of the strtol function with the value of 16 for

the base argument. The corresponding argument is a pointer to integer.

e,f,g Matches an optionally signed floating-point number, whose format is the same as

expected for the subject string of the strtod function. The corresponding argu-

ment is a pointer to floating.

Note:

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