C++

This article introduces the C language to realize the thread pool, support the dynamic expansion and destruction, share for everyone's reference, the specific contents are as follows Implementation features 1. Initialize the specified number

Static in C can be used to modify variables, or to modify functions.First look at the time to modify the variable. Variables in C can be divided into the existence of global data areas, stacks and heaps. In fact, we usually say the stack is stack

Valgrind is a software development tool for memory debugging, memory leak detection, and performance analysis. Valgrind's original author was Julian Seward, who won the second Google-o ' Reilly Open source Code award in 2006 for his work on the

Formal parameters and actual parameters In most cases, when calling a function, the function is parameterized. There is a data transfer relationship between the calling function and the called function. As mentioned earlier: the variable name in

In fact, the break statement can also be used in a loop body. The general format of the break statement is: Break The function is to enable the process to jump out of the loop body from within the loop, that is, to end the loop

constructor function:Executes automatically when a class instantiates an object, initializing the data in the class. Constructors can be from load, there can be multiple, but only one default constructor. destructor:A function that takes some

The concept of C + + filesTo date, the input output we have discussed is based on a system-specified standard device (input device is keyboard, output device is a monitor). In practical applications, disk files are often used as objects. That is,

First, optimize the memory1. Policy: Pre-allocate the memory used to create the object, and construct each new object in the allocated memory when needed. 2, allocator class; A.destroy (P), run the destructor of the object referred to t* pointer p.

For example, the concatenation function of a string is strcat.prototype:extern char *strcat (char *dest,char *src);usage:#include function: to add the string src refers to the end of the dest (covering the end of the ' dest ') and add '

In C language, the print function is used for output, and the scanf function is used to input. C + + retains the use of this language.The general format of the scanf function is: SCANF (format control, output table column) The

C language Strerror () function: A description string that returns the cause of the errorheader file: #include To define a function: char * strerror (int errnum); Function Description: Strerror () is used to query the

Every time I write a summary I think it is a headache, because I know the abstract is really important, it almost directly determines the number of readers. May have spent 962 of tigers to write out something that because of the failure of the

The variable parameter means that the number of parameters can change, can be more or less, also indicate the types of parameters can also change, can be int,double can also be char*, class, structure and so on. A variable parameter is the key to

C Language String Size comparison #include #include int fun (char *a,char *b) { int i = 0,j = 0; while (A[i]&&b[j]) { if (a[i]-b[j]>0) return 1; else if (a[i]-b[j] The above mentioned is the entire content of this

Containers in C + + can be roughly divided into two broad categories: sequential containers and associated containers. The sequential container contains a sequential container adapter.Sequential containers : Aggregates elements of a single type into

Principle: 1, the nature of the Commission is a pointer, a function pointer, get the function of the first address can; C # 's delegate adds security, which is reflected in the type detection of the function instruction block referenced by the

Non-recursive traversal of binary treeBinary tree is a very important data structure, many other data structures are based on the binary Tree Foundation evolved. For binary trees, there are three kinds of traversal methods, such as sequence, middle

1.the prototype of the String class member function C_str (): const char *C_STR () const;//returns a null-terminated C string 2.the C_STR () function returns a pointer to the normal C string, which is the same as the object of the string class,

C language ToLower () function: Convert uppercase letters to lowercase lettersheader file: #include To define a function: int toupper (int c); Function Description: If the parameter c is a lowercase letter, the

For example, the "You", "good", ",", "C", "!", "\ n" in the following source program are the characters that the program will handle. Copy Code code as follows: #include int main (void) { printf ("Hello, c!\n"); return 0; }