How to swap two variables, without using third variable ?
Answer Posted / trinath somarouthu
using X-OR
#define SWAP(x,y) x^=y^=x^=y
x = x ^ y --> x^=y -- (1)
y = y ^ x --> y^=x -- (2)
x = x ^ y --> x^=y -- (3)
(3) in (2) --> y^=x^=y -- (4)
(4) in (1) --> x^=y^=x^=y -- :-)
all togeather, he single line code
#define SWAP(x,y) x^=y^=x^=y
| Is This Answer Correct ? | 17 Yes | 13 No |
Post New Answer View All Answers
How do you verify if the two sentences/phrases input is an anagram using predefined functions in string.h and by using arrays?
3) Int Matrix of certain size was given, We had few valu= es in it like this. =97=97=97=97=97=97=97=97=97=97=97 1 = | 4 | | 5 | &= nbsp; | 45 =97=97=97=97=97=97=97=97=97=97=97 &n= bsp; | 3 | 3 | 5 | = | 4 =97=97=97=97=97=97=97=97=97=97=97 34 |&nbs= p; 3 | 3 | | 12 | &= nbsp; =97=97=97=97=97=97=97=97=97=97=97 3 | &nbs= p; | 3 | 4 | = | 3 =97=97=97=97=97=97=97=97=97=97=97 3 | = ; | | | = ; 3 | =97=97=97=97=97=97=97=97=97=97=97 &= nbsp; | | 4 | = ; | 4 | 3 We w= ere supposed to move back all the spaces in it at the end. Note: = If implemented this prog using recursion, would get higher preference.
how to create a 3x3 two dimensional array that will give you the sums on the left and bottom columns
To Write a C program to remove the repeated characters in the entered expression or in entered characters(i.e) removing duplicates. String contains only lowercase characters ['a'-'z']
Write a routine to implement the polymarker function
Design an implement of the inputs functions for event mode
how to test pierrot divisor
In a gymnastic competition, scoring is based on the average of all scores given by the judges excluding the maximum and minimum scores. Let the user input the number of judges, after that, input the scores from the judges. Output the average score. Note: In case, more than two judges give the same score and it happens that score is the maximum or minimum then just eliminate two scores. For example, if the number of judges is 5 and all of them give 10 points each. Then the maximum and minimum score is 10. So the computation would be 10+10+10, this time. The output should be 10 because 30/3 is 10.
write a c program to input initial & final time in the format hh:mm and find the time intervel between them? Ex inputs are initial 06:30 final 00:05 and 23:22 final 22.30
why do you use macros? Explain a situation where you had to incorporate macros in your proc report? use a simple instream data example with code ?
What is the difference between proc means and proc tabulate ? explain with a simple example when you have to use means or tabulate?
Write a program to model an exploding firecracker in the xy plane using a particle system
Set up procedure for generating a wire frame display of a polyhedron with the hidden edges of the object drawn with dashed lines
write a function to give demostrate the functionality of 3d in 1d. function prototye: change(int value,int indexX,int indexY,int indexZ, int [] 1dArray); value=what is the date; indexX=x-asix indexY=y-axis indexZ=z-axis and 1dArray=in which and where the value is stored??
#include
