Sorry what is function of the system(pause)

Answer 1

it pauses the compiler so it doesn't just pop up on the screen and jumps back off immediately

Answer 2

It prompts the user with a message saying "press any key to continue . . ." preventing the program from automatically exiting at the end of your code.

This is useful for when you want to examine the structure of your output

Answer 3

You can use getch(); in the end of ur program right before return 0; to do the same thing