2、long int c； (int)c； If the c variable is a long integer, then the following statement is the process of converting a long integer into an integer.
3. () is the type to be converted. Of course, the conversion between them also follows the principle of feasibility.
4. Forced conversion is also a kind of function encapsulation, which abides by certain rules and conditions. Of course, you can also construct a cast function yourself.
5. You can also convert the results of two integer operation expressions into floating-point data.