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Subject: Computer Science Grade Level: 11 Lesson Title: Exploring String Functions in C Objective: Students will be able to: # Understand the concept of strings in C programming. # Learn about different string functions available in the C standard library. # Apply string functions to manipulate and process strings in C programs. Materials Needed: # Whiteboard and markers or presentation slides or grade 11 computer science book # Examples of code snippets demonstrating string functions # Computers with programming environments installed (optional, for practical exercises) Lesson Duration: 50 minutes Procedure: # Introduction to Strings (5 minutes): #* Begin the lesson by defining strings as sequences of characters terminated by a null character ('\0'). #* Explain the importance of strings in programming for representing text data. #* Discuss how strings are stored in memory as arrays of characters. # Overview of String Functions (10 minutes): #* Introduce the concept of string functions as pre-defined functions provided by the C standard library for manipulating strings. #* Discuss the advantages of using string functions for common string operations. #* Mention that string functions are declared in the <code><string.h></code> header file. # Commonly Used String Functions (30 minutes): #* Present a list of commonly used string functions, such as: #** <code>strlen()</code>: Returns the length of a string. #** <code>strcpy()</code>: Copies one string to another. #** <code>strcat()</code>: Concatenates (appends) one string to another. #** <code>strcmp()</code>: Compares two strings. #** <code>strchr()</code>: Searches for a character in a string. #** <code>strstr()</code>: Searches for a substring in a string. #* Explain the syntax and parameters of each function and provide examples to illustrate their usage. #* Discuss error handling and potential pitfalls when using string functions. # Practical Exercise (10 minutes): #* If computers are available, provide a programming task involving the use of string functions. #* Alternatively, distribute paper-based exercises or worksheets for students to practice using string functions. #* Encourage students to work individually or in pairs to solve the exercises. # Conclusion (5 minutes): #* Summarize the key points covered in the lesson, emphasizing the importance of string functions in C programming. #* Encourage students to explore additional string functions and experiment with them in their programming projects. #* Provide resources for further learning, such as online documentation or tutorials on string functions in C.
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