In C/C++ courses and projects, the application of functions is crucial. Here, we have gathered and organized some commonly used functions in C/C++. We hope you can apply them frequently to gain proficiency. 1. Character Processing Functions This category of functions is used for processing individual characters, including character type testing and case conversion. Header … Read more
In 2014, the open-source library OpenSSL, which supports secure transport layer protocols, revealed a shocking vulnerability in its TLS/DTLS Heartbeat extension, which contained a buffer overflow vulnerability. This is the infamous Heartbleed vulnerability. This vulnerability allowed attackers to obtain encrypted data and steal the keys used for encryption. Since OpenSSL is one of the foundational … Read more
In the previous lesson, we dismantled the greatest program in the world, claiming that mastering it means you have grasped 60% of C language. In this lesson, we will discuss some key points related to C language. Review of Last Lesson’s Assignment In the last class, we left an assignment. I wonder if everyone completed … Read more
printf() and scanf() functions are used for input and output operations in C language. These two functions are built-in library functions defined in stdio.h (header file). printf() Function printf() function is used for output operations. It prints the given statement to the console. The syntax of the printf() function is as follows: printf("format string", argument_list); … Read more
Standard header files include: <asset.h> <ctype.h> <errno.h> <float.h> <limits.h> <locale.h> <math.h> <setjmp.h> <signal.h> <stdarg.h> <stddef.h> <stdlib.h><stdio.h> <string.h> <time.h> 1. Standard Definitions (<stddef.h>) The file <stddef.h> contains some common definitions of the standard library, and it is automatically included whenever any standard header file is included. This file defines: Type size_t (the result type of the … Read more
··· Exam Countdown: 36 Days ··· ◣Attention Candidates◥ Scan to Join the Preparation Group for Further Studies Courses/Exam Information/Materials/Benefits, one-on-one Q&A in the group! Key Point 1: Characteristics of C Language Structure 1. A C program consists of functions, and there must be exactly one function named main. 2. A C language function consists of … Read more
1、/*Output the 9*9 multiplication table. There are 9 rows and 9 columns, with i controlling the rows and j controlling the columns.*/ #include “stdio.h” main() {int i,j,result; for (i=1;i<10;i++) { for(j=1;j<10;j++) { result=i*j; printf(“%d*%d=%-3d”,i,j,result);/*-3d means left-aligned, occupying 3 spaces*/ } printf(“\n”);/*Line break after each row*/ } } 2、/*Classical problem: There is a pair of rabbits, … Read more
Click the blue text Follow us Due to changes in the public account’s push rules, please click “View” and add “Star” to get exciting technical shares as soon as possible Source from the internet, please delete if infringed Why Start Programming with C Language Many friends start programming with C language, but do you have … Read more
A programming language defines a set of instructions that are compiled together by the Central Processing Unit (CPU) to perform specific tasks. Programming languages mainly refer to high-level languages such as C, C++, Pascal, Ada, and COBOL. Each programming language contains a unique set of keywords and syntax used to create a set of instructions. … Read more
The scanf() and printf() functions are a nightmare for many beginners in C language. Especially scanf(), which involves the concept of variable addresses. If you forget to write the address operator &, the program often exits abnormally. Why is this? If you compile and execute the above program and input 2, 3, 4, the program … Read more