Can function argument type char be typecasted to unsigned int?
Please consider following function definition:
/* write a new value into a dataword */
unsigned int replace_byte (unsigned int dataword, int bytenum,
char byteval)
Can I typecast byteval as follows:
(unsigned int)byteval
If yes, what will be three most significant bytes of byteval after the typecasting. Will they be zeros.
/* write a new value into a dataword */
unsigned int replace_byte (unsigned int dataword, int bytenum,
char byteval)
Can I typecast byteval as follows:
(unsigned int)byteval
If yes, what will be three most significant bytes of byteval after the typecasting. Will they be zeros.
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>> To avoid that, use an unsigned char :
In that case, the 3 most significant bytes of the unsigned int will ALWAYS be all 0's.
In that case, the 3 most significant bytes of the unsigned int will ALWAYS be all 0's.
SOLUTION
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NB. By MSBs I mean Most Significant Bytes :)
unsigned int fun(unsigned char byteval) {
return (unsigned int)byteval;
}