problems with scanf(“%d\n”,&i) [duplicate]

Answer 1

It's because of the '\n in the scanf... If you want to move into a new line, just put :

printf ("\n");

and it'll give u an empty line...

Answer 2

scanf("%d\n",&i);

read the number till non-whitespace character appear(ignore all whitespace and '\n' after the number).

Answer 3

"I am not able to stop my program until I input two numbers when I use scanf("%d\n",&i);"
Although this format makes scanf read the number and store it into i, this "reading" continues and it lasts till non-whitespace character followed by \n is found. This is the reason why input 1 2 makes this scanf stop.

You should not specify newline in the input format in this case. Use scanf("%d",&i); instead.