write a program to swap two numbers without using third variable

Two numbers are taken from user and then swapped without using a third variable.

Select To use this code as it is.. select and copy paste this code into code.cpp file

1. #include<iostream.h>
2. #include<conio.h>
3. void main()
4. {
5. clrscr();
6. int a,b;
7. cout<<”Enter a: “;
8. cin>>a;
9. cout<<”Enter b: “;
10. cin>>b;
11. cout<<”Before swapping:”<<endl;
12. cout<<”a: “<<a<<” b: “<<b<<endl;
13. a=a+b;
14. b=a-b;
15. a=a-b;
16. cout<<”After swapping:”<<endl;
17. cout<<”a: “<<a<<” b: “<<b;
18. getch();
19. }

write a program to swap two numbers using a third variable

Two numbers are taken from the user and then swapped using a third variable.

Select To use this code as it is.. select and copy paste this code into code.cpp file

1. #include<iostream.h>
2. #include<conio.h>
3. void main()
4. {
5. clrscr();
6. int a,b,c;
7. cout<<”Enter a: “;
8. cin>>a;
9. cout<<”Enter b: “;
10. cin>>b;
11. cout<<”Before swapping:”<<endl;
12. cout<<”a: “<<a<<” b: “<<b<<endl;
13. c=a;
14. a=b;
15. b=c;
16. cout<<”After swapping:”<<endl;
17. cout<<”a: “<<a<<” b: “<<b;
18. getch();
19. }