INTERVIEW QUESTIONS C OPERATORS IN C DETAILS

Question: Write Addition of two numbers using Bitwise operators.

Answer: #include<stdio.h>

int main()
{
int a,b,sum, carry;
scanf("%d
%d",&a,&b);
sum = a ^ b;
carry = a & b;
while (carry != 0)
{
carry <<= 1;
a = sum;
b = carry;
sum = a ^ b;
carry = a & b;
}
printf("%d",sum);
getchar();
}

#include<stdio.h>

int main()
{
int a,b,sum, carry;
scanf("%d
%d",&a,&b);
sum = a ^ b;
carry = a & b;
while (carry != 0)
{
carry <<= 1;
a = sum;
b = carry;
sum = a ^ b;
carry = a & b;
}
printf("%d",sum);
getchar();
}

Source: CoolInterview.com

a,b be the variables

b=a^b;
a=a^b;
b=a^b;

Source: CoolInterview.com

#include<stdio.h>
#include<conio.h>
int add(int,int);
main()
{
int a,b,sum;
printf("Enter values of a,b");
scanf("%d %d",&a,&b);
sum=add(a,b);
printf("
%d",sum);
getch();
}
int add(int a,int b)
{
int x,y;
do
{
x=a^b;
y=a&b;
a=x;
b=y<<1;
}while(b);
return(x);
} Source: CoolInterview.com

int main()
{
int num1,num2;
printf("Enter Two Number
");
scanf("%d %d",&num1,&num2);
printf("ADD = %d
",(num1^num2)|((num1&num2)<<1));
return 0;
}
Source: CoolInterview.com

#include<stdio.h>
void main()
{
int x,y,z;
printf("Enter two no :");
scanf("%d%d",&x,&y);
while(y)
{
z=x^y;
y=(x&y)<<1;
x=z;
}
printf("%d",z);
} Source: CoolInterview.com

#include<stdio.h>
main()
{
int a,b,c;
printf("Read values from keyboard (a&b): ");
scanf("%d%d",&a,&b);
c=(a==b || a!=b)?printf("%d",a+b):printf("%d",a+b);
}
Source: CoolInterview.com

char given = 0x56; // let it be any two number(2 nibble character)
char leftpart = 0x00;
char rightpart = 0x00;
char multiplication = 0x00;
leftpart = given >> 4;

rightpart = given << 4;
rightpart = rightpart >> 4;
printf("left hand number is %x
", leftpart);
printf("right hand number is %x
", rightpart);

multiplication = (leftpart&1?rightpart:0) + (leftpart&2?rightpart<<1:0) + (leftpart&4?rightpart<<2:0) + (leftpart&8?rightpart<<3:0);
printf("multiplication is %d", multiplication );
Source: CoolInterview.com

#include<stdio.h>
main()
{
int a,b,c;
prinf("enter two num%d %d",a,b);
c=b;
b=a^b;
a=a^b;
c=(a^b)^c;
printf("%d",c);
getch();
} Source: CoolInterview.com

Hey kiran
your code is wrong
your logic is not working

#include<stdio.h>
main()
{
int a,b,c;
prinf("enter two num%d %d",a,b);
c=b;
b=a^b;
a=a^b;
c=(a^b)^c;
printf("%d",c);
getch();
}


Posted by: Kiran
Source: CoolInterview.com

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