Compiler bug or programming error?

[johnl]

// CCS compiler 3.218

#include <18F452.h>

long present_day_of_year_number;

byte present_day;

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present_day = 0b00010110; // = 16 (BCD test data)


// this way produces output of 0:

present_day_of_year_number = (long)( 10*(present_day>>4) + present_day&0x0F );

printf("\r Pres. DOY# : %ld", present_day_of_year_number);


// however this way produces proper output of 16:

present_day_of_year_number = (long)(10*(present_day>>4) );
present_day_of_year_number += (long) (present_day&0x0F);

printf("\r Pres. DOY# : %ld", present_day_of_year_number);

[PCM programmer]

[johnl]

Yes -adding parentheses did it.

Thanks!


present_day_of_year_number = (long)( 10*(present_day>>4) + (present_day&0x0F) );