Why isn't output coming?

Question

swapping program
https://code.sololearn.com/ceek43rKIoTL/?ref=app

Answer 1

You did not put the format specifiers in the printf string.
Correct code is:
printf("values after swapping : %d %d",a,b);
Format specifiers are used to let the computer know which data type should be printed in this case.

Answer 2

sorry, my mistake I forgot to and thks :-)

Answer 3

The second print statement
You forgot %d...
printf("values after swapping : %d %d",a,b);