INTERVIEW QUESTIONS C OPERATORS IN C DETAILS

Question: How to add 2 numbers without + sign?

Answer: Ans is ::
((a*a)-(b*b))/(a-b)

make a try it will work

Ans is ::
((a*a)-(b*b))/(a-b)

make a try it will work
Source: CoolInterview.com

You could probably just do
a-(0-b). Source: CoolInterview.com

a+b=a-(-b)
simple one .isn't it
Source: CoolInterview.com

a+b=a&b Source: CoolInterview.com

void main( void )
{
int a = 15;
int b = 16;
int c = ((a*a) - (b*b))/(a-b);
printf("%d
",c);
}
Source: CoolInterview.com

ans:

int a,b,c;
c=a||b;
printf("%c",c); Source: CoolInterview.com

"((a*a)-(b*b))/(a-b)"
The above one will not work. it is broken for a = 1 and b = 1. the result is 0/0. Source: CoolInterview.com

#include <stdio.h>
int add(int a, int b){
if (!a) return b;
else
return add((a & b) << 1, a ^ b);
}

int main(){
int a,b;
printf("Enter the two numbers:
");

scanf("%d",&a);
scanf("%d",&b);
printf("Sum is: %d",add(a,b));
}
/*pls use bitwise operators */ Source: CoolInterview.com

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