Zilog Z8F0130 Manual de usuario descargar pdf (Pagina 115)

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Zilog Developer Studio II – Z8 Encore!

User Manual

unsigned char uch3 = 128;

int int1;

char ch1 = -2;



int main(void)

{

puts("START");



int1 = uch1 - uch2;

if (int1 != -1)

puts("NOT EQUAL");//nopromote:00FFh != FFFFh

else

puts("EQUAL");//promote: FFFFh == FFFFh



if (uch3 < ch1)

puts("UNSIGNED");//nopromote:(uchar)80h < (uchar)FEh

else

puts("SIGNED");//promote: (int) 128 > (int) -2



puts("DONE.");

}

The following recommended programming practices are good practice in any case for pro-

ducing code that is both correct and efficient. These practices are especially important to

avoid trouble if you are using the deprecated Disable ANSI Promotions option:

•

Use variables of type char or unsigned char wherever the expected range of values for

the variable is [

-128..127] or [0..255], respectively.

•

Use explicit casts (to int, unsigned int, long or unsigned long) in which the result of an

expression is expected to overflow the larger of the two operand types. (Even with

ANSI promotions disabled, the compiler automatically promotes a smaller operand so

that the types of the operands match.)

•

It is good programming practice to use explicit casts, even where automatic promo-

tions are expected.

•

Explicitly cast constant expressions that you want to be evaluated as char (for exam-

ple,

(char)0xFF).

Librarian Page

The options in the Librarian page are described in this section.

This page is available for Static Library projects only.

To configure the librarian, use the following procedure:

Note:

1 2 ... 110 111 112 113 114 115 116 117 118 119 120 ... 213 214

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