Long int f= 123L in C language leads to printf f=%ld. Why is f= 123?
%ld: Long integer data is represented in the standard input and output of C language.
Dragon? int？ f = 123 l； //The suffix l or l indicates that the type of the constant is long int. Just as the f or f of floating-point number is a single-precision floating-point number, it will not be output.