why this would result in long integer overflow

Question

I checked the document that long= int64 has range more than 900,000,000,000,000

Here is my code:

int r = 99;
long test1 = r*r*r         


        

Answer 1

Your second test fails because each 99 is an integer; replace it with the following and it compiles.

long test2 = 99L * 99L * 99L * 99L * 99L;

See the MSDN Long Documentation for details.