Code:
#include stdio.h
void changebits(int, int, int, int);
int main()
{
int num1, num2, pos1, pos2;
printf("**Replacing the bits in integer x from bit position a to b from another integer y**\n");
printf("read number 1\n");
scanf("%x", &num1);
printf("Read number 2:\n");
scanf("%x", &num2);
printf("Read LSB postion:\n");
scanf("%d", &pos1);
printf("MSB should always be greater than LSB\n");
printf("Read MSB position:\n");
scanf("%d", &pos2);
changebits(num1, num2, pos1, pos2);
return 0;
}
/*Function to swap bits in given positions*/
void changebits(int num1, int num2, int pos1, int pos2)
{
int temp1, temp_1, buffer2, bit1 = 0, bit2 = 0, counter = 0, a = 1;
temp1 = num1;
temp_1 = num1;
buffer2 = num2;
for (;pos1 <= pos2;pos1++)
{
a = 1;
num1 = temp_1;
num2 = buffer2;
while (counter <= pos1)
{
if (counter == pos1)
bit1 = (num1&1); //placing the bit of position 1 in bit1
counter++;
num1>> = 1;
}
counter = 0;
while (counter <= pos1)
{
if (counter == pos1)
bit2 = (num2&1); //placing the bit of position 2 in bit2
counter++;
num2 >>= 1;
}
counter = 0;
if (bit1 == bit2);
else
{
while (counter++
a = a << 1;
temp1 ^= a; //placing the repplaced bit integer into temp1 variable
}
counter = 0;
}
printf("the number num1 after shifting the bits is 0x%x\n", temp1);
}
Output:
**Replacing the bits in integer x from bit position a to b from another integer y**
read number 1
0x11223344
Read number 2:
0x55667788
Read LSB postion:
12
MSB should always be greater than LSB
Read MSB position:
19
the number num1 after shifting the bits is 0x11267344
More C Programs:
