 C166 User's Guide | |
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C166 User's Guide
C166 Introduction Compiling Programs
Environment Settings Command Prompt ERRORLEVEL Output Files Listing (LST) File Preprocessor (I) File Object (OBJ) File Source (SRC) File Directives Reference ASM ASMEXPAND BROWSE BYTEALIGN CODE COMMONRET COMPACT COND DEBUG DEFINE DISABLE DYNAMICUSRSTK EJECT ENDASM EXTINS FIX_BR03 FIX166 FIX167 FIX272 FIX32F FIXBFLD FIXMDU FIXPEC FIXROM FLOAT64 HCOMPACT HLARGE HOLD INCDIR INIT LARGE LISTINCLUDE MAC MEDIUM MOD167 MODV2 NOALIAS NOAMAKE NOASMEXPAND NOCOND NODPPSAVE NOEXTEND NOFIXDPP NOFRAME NOINIT NOOBJECT NOPRINT NOREORDER NOSAVEMAC OBJECT OPTIMIZE ORDER PACK PAGELENGTH PAGEWIDTH PECDEF PREPRINT PREPRINTONLY PRINT REENTRANT REGFILE RENAMECLASS REORDER RESTORE SAVE SAVEMAC SAVESYS SAVEUSR SMALL SRC STATIC SYMBOLS TABS TINY UNSIGNED_CHAR USERSTACKDPP3 WARNING WARNINGLEVEL XLARGE Language Extensions Preprocessor Advanced Programming Error Messages Library Reference AppendixUNSIGNED_CHAR Compiler Directive
| Abbreviation | UCH | |||||||||
| Arguments | None. | |||||||||
| Default | Variables of type char are signed. | |||||||||
| µVision | Options — C166 — Treat 'char' as 'unsigned char'. | |||||||||
| Description | The UNSIGNED_CHAR directive instructs the compiler to treat all variables declared with char as unsigned char variables. | |||||||||
| Example |
C166 SAMPLE.C UNSIGNED_CHAR #pragma UCH The following example:
stmt lvl source
1 char ch1;
2 unsigned char uch2; /* always unsigned */
3 signed char sch3; /* always signed */
4
5 int i;
6
7 void test (void) {
8 1 if (ch1 > 0) i = ch1;
9 1 if (uch2 > 0) i = uch2;
10 1 if (sch3 > 0) i = sch3;
11 1 }
demonstrates code generated using the SIGNED_CHAR directive:
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