CPP learning Note 2 Data Type

Int A = 5; // declared as integer short int B = 10; // small memory occupied by short integer long c = 100; // omitting int means long integer long d = 100; // allocate more space for unsigned long e = 10000; // The unsigned long integer type is positive integer unsigned long F = 10000000; // The unsigned long integer allocates more memory space types as positive integer float G = 10.0; // float double H = 11.00; // double float char I = 'a'; // fill, in general, the system defaults to the integer <PRE name = "code" class = "CPP"> printf ("% d", a);/* % d format specifier it indicates printf () how should data be output? Each specifier can correspond to only one variable */

The memory size occupied by each data type is not only related to the system but also to the compiler.

CPP learning Note 2 Data Type