Are long-suffix and unsigned-suffix needed when declaring long literals in C++?

Question

I have some ancient memories of writing C code like:

long value = 0;

in the bad old Win16 days and ending up with value being

Answer 1

They are not required in the examples you gave. However, they may be needed in some somewhat recondite circumstances. For example, the following may produce different values:

sizeof(1)
sizeof(1L)