Manipulations de bits

Lim denne kommandoen inn i din terminal:

Passord for å koble til er

Manipulations de bits

Si la variable c est de type unsigned char sur 8 bits, lesquelles des suites d'instructions ci-dessous permettent d'en échanger les 4 bits de poids faible avec les 4 bits de poids fort ?

unsigned char temp1, temp2;
temp1=c << 4;
temp2=c >> 4;
c= temp2|temp1;

unsigned char temp1, temp2;
temp1 = c & 0x0F;
temp2 = c & 0xF0;
temp1=temp1 << 4;
temp2=temp2 >> 4;
c= temp2|temp1;

unsigned char temp1, temp2;
temp1 = c && 0x0F;
temp2 = c && 0xF0;
temp1=temp1 << 4;
temp2=temp2 >> 4;
c= temp2|temp1;

unsigned char temp1, temp2;
temp1=c << 4;
temp2=c >> 4;
c= temp2||temp1;

unsigned char temp1, temp2;
temp1=4 << temp1;
temp2=4 >> temp2;
c= temp2|temp1;

Forfatter(e)	Olivier Bonaventure
Frist	Ingen frist
Innleveringsgrense	Ingen begrensning

Informasjon

Merkelapper

Logg inn

Manipulations de bits

Manipulations de bits

Informasjon

Merkelapper

Logg inn

Manipulations de bits Kollapser kontekst

Manipulations de bits

Manipulations de bits