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In this tutorial you will learn swapping of two numbers using third variable C in programming language.
You can also see swapping of two number in C without using third variable.
How our program will behave?
In the swapping program using third variable we will assign two different value to two different variables.
We have also a third variable to store temporary variable in it.
Example of swapping : a=2 and b=4
Now after execution of swapping program output will be like
a=4 and b = 2
Swapping of two numbers using third variable in C language
#include<stdio.h>
#include<conio.h>
void main() {
int a, b, tempvar;
printf("enter the value of a: ");
scanf("%d", & a);
printf("enter the value of b: ");
scanf("%d", & b);
tempvar = a;
a = b;
b = tempvar;
printf("After swapping \n");
printf("value of a is : %d \n", a);
printf("value of b is : %d ", b);
getch();
}Output 1:
Enter the value of a: 23
Enter the value of b: 43
After swapping
Value of a is : 43
Value of b is : 23 Output 2:
Enter the value of a: 12
Enter the value of b: 98
After swapping
Value of a is : 98
Value of b is : 12 Explanation of the above program
- Above program is for swapping two number in C using third variable.
- In the above program there are three variables a, b in which we assign the user inputs and tempvar is to persist the one variable value.
- Here the logic is very simple. We are just exchanging the value with no any mathematical calculation.
- We are assigning the value of a in tempvar and then value of b into a. And at last tempvar value into b.
- Only this is the simple logic.
I hope this is clear to you.
Thanks for reading.