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;

which function is used to clear the buffer stream on gcc? for example: I wrote following code on gcc #include<stdio.h> int main(void) { char ch; int a,b; printf("\nenter two numbers:\t"); scanf("%d%d",&a,&b); printf("enter number is %d and %d",a,b); printf("\nentercharacter:\t"); scanf("%c",&ch); printf("enter character is %c",ch); return 0; } in above progarm ch could not be scan. why?plz tell me solution.

2 Answers  

program to find magic aquare using array

4 Answers   HCL,

Can you send Code for Run Length Encoding Of BMP Image in C Language in linux(i.e Compression and Decompression) ?

0 Answers   Honeywell,

void main() { char a[]="12345\0"; int i=strlen(a); printf("here in 3 %d\n",++i); }

3 Answers  

main() { char a[4]="HELLO"; printf("%s",a); }

3 Answers   CSC,

main() { int c[ ]={2.8,3.4,4,6.7,5}; int j,*p=c,*q=c; for(j=0;j<5;j++) { printf(" %d ",*c); ++q; } for(j=0;j<5;j++){ printf(" %d ",*p); ++p; } }

2 Answers   Wipro, CSS,

main() { int i=1; while (i<=5) { printf("%d",i); if (i>2) goto here; i++; } } fun() { here: printf("PP"); }

1 Answers  

What is the match merge ? compare data step match merge with proc sql merge - how many types are there ? data step vs proc sql

0 Answers  

# include<stdio.h> aaa() { printf("hi"); } bbb(){ printf("hello"); } ccc(){ printf("bye"); } main() { int (*ptr[3])(); ptr[0]=aaa; ptr[1]=bbb; ptr[2]=ccc; ptr[2](); }

1 Answers  

1 o 1 1 0 1 0 1 0 1 1 0 1 0 1 how to design this function format in c-language ?

2 Answers  

main() { char *str1="abcd"; char str2[]="abcd"; printf("%d %d %d",sizeof(str1),sizeof(str2),sizeof("abcd")); }

1 Answers  

main() { char *p="hai friends",*p1; p1=p; while(*p!='\0') ++*p++; printf("%s %s",p,p1); }

3 Answers