String Handling in C: Common Functions and String Manipulation Techniques In C, strings are stored as arrays of characters, terminated by a null character (‘\0’). Although C does not have a built-in string type, we can manipulate strings using a series of functions from the standard library. This article will introduce some common string handling … Read more
Linux expr Command <span>expr</span> is a powerful command-line tool in Linux systems used for evaluating expressions, performing arithmetic operations, string manipulation, and logical comparisons. It is widely used in shell scripts for dynamic processing and value calculations. Although modern shells (like Bash) provide built-in arithmetic and string manipulation capabilities, <span>expr</span> still holds significant value due … Read more
📌 Problem Description Write a function str_replace that replaces the first occurrence of an old substring with a new substring in the given string, returning the modified new string. Requirements: Only a single replacement is required The returned new string must be dynamically allocated Example: Input: str="Hello World", old="World", new="C" Output: "Hello C" Difficulty: ⭐️ … Read more
#include <stdio.h> #include <string.h> #include <ctype.h> typedef void (*funcPtr)(char *); // 1. Remove leading and trailing whitespace (similar to Python's strip) void trim(char *str) { int i = 0, j; int len = strlen(str); // Remove leading whitespace while (isspace(str[i])) i++; // Remove trailing whitespace j = len – 1; while (j >= 0 && … Read more
String Operations in the C++ Standard Library In C++, strings are one of the most commonly used data types in our daily programming. The C++ Standard Library provides the <span>std::string</span> class to facilitate string manipulation. This article will detail how to use <span>std::string</span> for various basic string operations, including creation, access, modification, and querying. Creating … Read more
Previous Highlights:CMake Hello, WorldCMake VariablesCMake Official Tutorial (Basic Project Setup)CMake Official Tutorial (Library Creation)CMake Official Tutorial (Usage Requirements)CMake Official Tutorial (Installation and Testing)CMake Common Syntax (if Statements)CMake Common Syntax (Cache Variables)CMake Common Syntax (Environment Variables)CMake Common Syntax (Mathematical Calculations) In mainstream programming languages, strings are a fundamental and core data type, which is crucial, and … Read more
3.Characters and Strings In MATLAB, several characters (Character) can form a string (String). A string is considered a row vector, and each character in the string (including space characters) is stored in each element of this vector in its ASCII form, although its visible representation remains readable characters. The string type plays a very important … Read more
1.String “\\“ABC\“\\“ has a length of . A. 11 B. 7 C. 5 D. 3 Answer Explanation: The string constant consists of several characters, and the string length does not count ‘\0’ (the null terminator character), so in this question, \\ is one byte, \” is one byte, A is one byte, B is one … Read more