C # to c++--c# transformation C + + road (i) C

It takes a lot of determination to do a full-time study. Some people will say, why not work while learning. Indeed, everyone has their own way, I choose to go to the bottom of the technology, rapid. So, after a long period of consideration, I still choose to study full-time.

Now that you learn C/C + +, you should learn.

Constant:

C's constant is different from C #, and of course, the syntax of C # is Microsoft encapsulated. The constants of C are defined by # define, which is the macro in C. Its essence is the compiler pre-compilation phase for text substitution. Replace the macro defined by # define with the location where the macro is used.

and const is the keyword in C # that defines constants. However, in C, Const defines a read-only variable and must be assigned when defined, otherwise it cannot be assigned.

+ + with--:

Self-increment and self-reduction.

int I=10;int a=i++ + i;i=10;int b= ++i + i;

The above code is a=21,b=22 in C #, because i++ takes effect the next time the variable is used in C #.

In C, this code a=20 b=22

The difference between this and C # is that i++ is a self-increment after the execution of the expression is complete.

That is, i++ + i in C i++ equals 10, because the expression has not been executed, so the value of I is still 10. So i++ + i is actually 10

Long

In C, the long type, under the 32-bit operating system, is also 4 bytes with the int type. In most 64-bit operating systems, it is 8 bytes. But a long long is 8 bytes.

C # to c++--c# transformation C + + road (i) C