Bitwise Class Activity
- Write a C assignment program that will ask the user for an unsigned integer.
- Then ask the user whether they want to shift right or left.
- Then ask them how many bits to shift it.
- After getting all the values to perform the bitwise operation.
- Print out the resulting integer value in decimal.
- No getopt is needed.
- Use integer value 8, use left shift, use 2 bits for how many.
Solution:
#include < stdio.h>
int main(int argc, char** argv)
{
char buffer[50];
unsigned val;
char dir;
int amount;
int result;
printf("Please enter an unsigned integer: ");
//Read in string
fgets(buffer, sizeof(buffer) - 1, stdin);
//Get int from string
sscanf(buffer, "%u", &val);
printf("Shift left or right? (L or R): ");
//Read in string
fgets(buffer, sizeof(buffer) - 1, stdin);
//Get char from string
sscanf(buffer, "%c", &dir);
printf("How many bits to shift: ");
//Read in string
fgets(buffer, sizeof(buffer) - 1, stdin);
//Get int from string
sscanf(buffer, "%d", &amount);
//Shift Left
if (dir == 'l' || dir == 'L')
{
result = val << amount;
printf("Shifting %u left by %d gives %d\n", val, amount, result);
}
//Shift Right
else
{
result = val >> amount;
printf("Shifting %u right by %d gives %d\n", val, amount, result);
}
}