Answer / swapna

Hi this question was asked in my interview.
Ans is :

a=a+b;
b=a-b;
a=a-b;

Any other solution?

Answer / guest

use xor to swap

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

Answer / somasekhar

Ans is :

a=a*b;
b=a/b;
a=a/b;

Answer / kiran

a=a+b;
b=a-b;
a=a-b

Answer / mohit

x = x + y;

y = x - y;

x = x - y;

Answer / bruce tuskey

Only the Xor answer (#2) is correct (in cases where the
variables are the same size). With all the other answers,
you could run into over/under flow problems.
A = 01111111
B = 01111101

A = A^B = 00000010
B = A^B = 01111111 (Original A)
A = A^B = 01111101 (Original B)

Answer / partha

a=b-a+(b=a);

Answer / gowtham

2 one will work correct

Answer / pavan.

void main()
{
int a,b;
printf("Enter two number : ");
scanf("%d%d",&a,&b);
a=a+b;
b=a-b;
a=a-b;
printf("The swap number is : %d %d",a,b);
getch();
}

Answer / yash

Answer no 12 is wrong. the logic fails when a=0;

struct aaa{ struct aaa *prev; int i; struct aaa *next; }; main() { struct aaa abc,def,ghi,jkl; int x=100; abc.i=0;abc.prev=&jkl; abc.next=&def; def.i=1;def.prev=&abc;def.next=&ghi; ghi.i=2;ghi.prev=&def; ghi.next=&jkl; jkl.i=3;jkl.prev=&ghi;jkl.next=&abc; x=abc.next->next->prev->next->i; printf("%d",x); }

1 Answers  

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1 Answers  

main(){ int a= 0;int b = 20;char x =1;char y =10; if(a,b,x,y) printf("hello"); }

1 Answers   TCS,

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1 Answers  

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1 Answers  

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1 Answers  

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1 Answers  

how many processes will gate created execution of -------- fork(); fork(); fork(); -------- Please Explain... Thanks in advance..!

8 Answers   GATE,

main() { int i=400,j=300; printf("%d..%d"); }

3 Answers  

Is the following code legal? typedef struct a { int x; aType *b; }aType

1 Answers  

How to return multiple values from a function?

7 Answers  

main() { int i=-1; -i; printf("i = %d, -i = %d \n",i,-i); }

1 Answers