Detailed Explanation and Examples of Input and Output Stream Operations in C Language In C language, input and output (I/O) is the primary way for programs to interact with the external environment. Through the standard input-output library <span><stdio.h></span>, we can easily read and write data. This article will provide a detailed introduction to input and … Read more
01 The ASCII value of the digit character ‘0’ is 48. Given the following program: main() { char a=’1′,b=’2′; printf(“%c,”,b++); printf(“%d\n”,b-a); } The output of the program is: A) 3,2 B) 25,2 C) 2,2 D) 2,25 Answer: C Explanation: printf(“%c, b++): The initial value of b is ‘2’ (ASCII value 50); b++ is a post-increment, … Read more
In programming, recursion is a powerful technique that allows a function to call itself to solve problems. C, as a classic programming language, supports the definition and use of recursive functions. This article will detail what recursion is, how to implement recursion in C, and some common application examples. What is Recursion? Recursion refers to … Read more
01 Read the following program: void swap(char *x, char *y) { char t; t=*x; *x=*y; *y=t; } main() { char *s1=”abc”, *s2=”123″; swap(s1,s2); printf(“%s,%s\n”,s1,s2); } The output of the program is A) 123,abc B) abc,123 C) 1bc,a23 D) 321,cba Answer: C Analysis: The function swap works as follows: t = *x; saves the character pointed … Read more
Introduction The Eight Queens problem is a classic combinatorial optimization problem that requires placing 8 queens on an 8×8 chessboard such that no two queens threaten each other. In other words, no two queens can be in the same row, column, or diagonal. This problem can be effectively solved using the backtracking algorithm. This article … Read more
01 Observe the following statement: char str1[10], str2[10] = {“books”}; The correct statement that can assign the string “books” to the array str1 is A) str1 = {“Books”}; B) strcpy(str1, str2); C) str1 = str2; D) strcpy(str2, str1); Answer: B Explanation: For option A: Correct, using the standard library function to copy the string. For … Read more
The C language is a powerful programming language widely used in system software and game development. Although modern games typically use higher-level languages and engines, C remains the foundation for many low-level graphics and logic implementations. In this article, we will explore how to use C for simple game development, including basic graphics rendering and … Read more
Analysis of the Applications and Advantages of C Language in System Programming The C language is a general-purpose programming language widely used in the field of system programming. Its design intention is to provide an efficient, flexible, and hardware-near programming method, allowing programmers to directly manipulate computer hardware resources. This article will detail the applications … Read more
Comprehensive Analysis of String Handling Functions in C Language In C language, strings are stored as arrays of characters and are terminated with a null character <span>'\0'</span>. The C standard library provides a series of functions to handle strings, which are defined in the header file <span><string.h></span>. This article will detail commonly used string handling … Read more
In practical development, one often encounters the following question: #include "imx6ul.h" Clearly, this header file is not in the directory of the current <span>.c</span> file, yet the compilation passes smoothly. Why is this? This article will explain the header file search rules in C language for <span>#include</span>. 📌 1. Two Forms of <span>#include</span> <span>#include "filename"</span> … Read more