Question

The left-shift operator can be used to pack two character values into an unsigned integer variable. Write a program that inputs two characters from the keyboard and passes them to function packCharacters. To pack two characters into an unsigned integer variable, assign the first character to the unsigned variable, shift the unsigned variable left by 8- bit positions and combine the unsigned variable with the second character using the bitwise inclusive OR operator. The program should output the characters in their bit format before and after they are packed into the unsigned integer to prove that the characters are in fact packed correctly in the unsigned variable.

Write the program in C.

Enter two characters: A B A' in bits as an unsigned integers is: 65-00000000 01000001 an unsigned integers is: 'Bin bits as 66-00000000 01000010 'A' and 'B' packed in an unsigned integer 16706-01000001 01000010

Answer 1

The code will be

#include<stdio.h>
void bin(unsigned n)//helper function to print an unsigned number in binary.
{
unsigned i;
for (i = 1 << 31; i > 0; i = i / 2)
(n & i)? printf("1"): printf("0");
}
int main() {
unsigned a,b;
printf("Enter two characters: ");
scanf(" %c %c",&a,&b);
printf("\'%c\' in bits as an unsigned integers is: \n%u = ",a,a);
bin(a);
printf("\n\'%c\' in bits as an unsigned integers is: \n%u = ",b,b);
bin(b);
printf("\n\'%c\' and \'%c\' in bits as an unsigned integers is: \n%u = ",a,b,a<<8 | b);
bin(a<<8 | b);
  
}

The output is

Enter two characters: A B 'A' in bits as an unsigned integers is: 65 "B' in bits as an unsigned integers is: 66 00000000000000000000000001000010 'A' and 'B' in bits as an unsigned integers is: 16706 = 00000000000000000100000101000010 00000000000000000000000001000001 . . .Program finished with exit code0 Press ENTER to exit console

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