Category：C
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Time：2021-10-22
There is a saying in C + + Primer: the constructor that can be called with a single argument defines a conversion from the formal parameter type to the class type. This sentence is represented by the following code: class A { A(B b);// Constructor for a single argument func(A a); } ….. A a； […]
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Time：2021-10-21
1. Principle of tree array In programming, we need to maintain the prefix and s of a one-dimensional array, let s [i] = a [1] + a [2] +… + a [i]. If we modify the value of any element a [i], the related prefix and s [i], s [i + 1],…, s [n] will […]
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Time：2021-10-21
Reference Reference: refers to lvalue reference Reference: take a small name to bind the object, instead of copying the initial value to the reference special: Cannot bind to literals and calculations Reference is not an object All operations on the reference are performed on the object bound to it Except for two exceptions, the type […]
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Time：2021-10-20
Original link: https://blog.csdn.net/zhgl7688 This article mainly introduces the difference and division between% C and% s in C language. I hope it will be helpful to you. Let’s follow Xiaobian and have a look! %The C format corresponds to a single character, and the% s format corresponds to a string. Example: char a; char b[20]; […]
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Time：2021-10-20
This paper mainly uses time () and strftime () functions to achieve c + + to obtain the system time. C + + system and time-related functions basically use the standard interfaces provided by C language It is a common operation to obtain the system time in the program. In many cases, it can be […]
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Time：2021-10-19
“Is the first programming language C reliable?” “Does C have a future?” “Should I consider learning C?” “C is too old!” Have you ever heard similar words? I’ve heard countless times. Some are face-to-face conversations, while others come from a forum. Although the answer is “depends on the specific situation”, in my humble opinion, learning […]
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Time：2021-10-19
This example shares the specific code of C language to realize a simple perpetual calendar for your reference. The specific contents are as follows #include <stdio.h> #include<stdlib.h> int year, month; int run[12] = { 31,29,31,30,31,30,31,31,30,31,30,31 }; int ping[12] = { 31,28,31,30,31,30,31,31,30,31,30,31 }; char week[7][10] = { “SUN”,”MON”,”TUE”,”WED”,”THU”,”FRI”,”SAT” }; bool IsLeap(int year) { If (year% 400 […]
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Time：2021-10-18
1、 Introduction I’ve been learning C language for some time. I just did a small project of codebook and shared it. 2、 Ideas and principles The password book, known by name, is a book that stores account passwords and plays the role of memos. The data to be remembered is encrypted and stored in the […]
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Time：2021-10-17
This example shares the specific code of C language codebook for your reference. The specific contents are as follows Function Description: 1. Account login (password verification, locking the account three times) 2. Function selection: 1. View all passwords 2. Add password 3. Delete password 4. Modify password 5. Query password 6. Unlock 7. Exit login […]
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Time：2021-10-16
1. =： In C language, the equal sign (=) is the assignment operator. The following is a brief description of the use of the assignment operator 1) Assignment of variables: inta; a = 10; Here is the assignment of 10 to A. after the assignment, the value of a is 10 2) Assignment of pointer […]
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Time：2021-10-16
This paper shares the specific code of C language password program for your reference. The specific contents are as follows Title Requirements Write code to simulate the user login scenario, and can only log in three times. (you are only allowed to enter the password three times. If the password is correct, you will be […]
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Time：2021-10-15
In the early 1970s, Bell Labs created C language, which is a by-product of unix development. Soon C became one of the most popular programming languages. But for Bjarne Stroustrup, C’s expression ability is not enough. Therefore, he expanded the C language in his doctoral thesis in 1983. Thus, the C language supporting […]
