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How to swap values between two variables without using a
third variable?
- 24 Answers
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Answer / banti sharma
main()
{
int a,b;
a=a+b;
b=a-b;
a=a-b;
}
in Answer of pinky she has taken a variale ia which is not
used in program. He He He
| Is This Answer Correct ? | 88 Yes | 16 No |
Answer / shobha
int x=10,y=20;
x=x+y (10+20=30)
y=x-y (30-20=10)
x=x-y (30-10=20)
x=20,y=10
x and y vales are swaped.
| Is This Answer Correct ? | 51 Yes | 12 No |
Answer / mona
swap(int var1,int var2)
{
var1=var1+var2;
var2=var1-var2;
var1=var1-var2;
}
thanks for asking.
| Is This Answer Correct ? | 45 Yes | 13 No |
Answer / siva
You can also do it with the exclusive or bitwise operator...
a = a ^ b;
b = a ^ b; ((a ^ b) ^ b == a)
a = a ^ b; ((a ^ b) ^ a == b)
| Is This Answer Correct ? | 27 Yes | 8 No |
Answer / gourab varma
#include<stdio.h>
#include<conio.h>
void main()
{
int a,b;
clrscr();
printf("enter value of a and b");
scanf("%d%d", &a,&b);
a=a+b;
b=a-b;
a=a-b;
printf("the value of a=%d\n the value of b is=%d", a, b);
getch();
}
| Is This Answer Correct ? | 8 Yes | 1 No |
How to swap two String values without using a
third variable?
In Java::
=========
String s1 = "Shyam Sundar Baishya" ;
String s2 ="Dilip Kumar";
System.out.println("Before swapping ............");
System.out.println("s3 == "+s1);
System.out.println("s4 == "+s2);
s1= s1+s2;
System.out.println("....................");
System.out.println("After swapping ............");
s2 = s1.substring(0,(s1.length()-s2.length()));
s1 = s1.substring(s2.length(),(s1.length()));
System.out.println("s3 == "+ s1);
System.out.println("s4 == "+ s2);
| Is This Answer Correct ? | 6 Yes | 0 No |
Answer / pushpendra
int x=10,y=20;
x=x+y (10+20=30)
y=x-y (30-20=10)
x=x-y (30-10=20)
x=20,y=10
x and y vales are swaped.
| Is This Answer Correct ? | 13 Yes | 9 No |
Answer / sriram
Hey guys, what about swaping variables contains string
values? All of your solutions will suck... Try this and swap
any datatype without third variable... Happy Sensible Coding..
$v = 'sriram';
$u = 'lakshmi';
$v .= $u;
$u = substr($v,0,(strlen($v) - strlen($u)));
$v = substr($v,(strlen($v) - strlen($u)-1), strlen($v));
echo 'u = ' . $u .'<br>';
echo 'v = ' . $v;
| Is This Answer Correct ? | 8 Yes | 4 No |
Answer / vinodkumar
main()
{
int a=10,b=8;
void swap(a,b)
/*it does not return any value because return statement can
return only one value at a time*/
{
a=a+b;/*a=10+8,a=18*/
b=a-b;/*b=18-8,b=10*/
a=a-b;/*a=18-10,a=8*/
printf("after swaping a= %dand b=%d",&a,&b);
}
getch()
}
| Is This Answer Correct ? | 5 Yes | 2 No |
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