String handling using library functions - Mini Project: Build & Apply

String handling using library functions

📖 Scenario: You are working on a simple program that processes a user's name. You want to learn how to use C library functions to handle strings easily.

🎯 Goal: Build a program that stores a name, calculates its length, copies it to another string, and compares it with another name using C string library functions.

📋 What You'll Learn

Create a character array called name with the exact value "Alice".

Create an integer variable called length to store the length of name.

Create a character array called copy to hold a copy of name.

Create a character array called other with the exact value "Bob".

Use strlen to find the length of name.

Use strcpy to copy name into copy.

Use strcmp to compare name and other.

Print the length of name, the copied string, and the comparison result.

💡 Why This Matters

🌍 Real World

String handling is essential in programs that process text, like user names, messages, or file paths.

💼 Career

Many software jobs require manipulating strings safely and efficiently using standard library functions.

1

DATA SETUP: Create the initial string variable

Create a character array called name and set it to the string "Alice".

C

# Your code here

Need a hint?

Use char name[] = "Alice"; to create the string.

2

CONFIGURATION: Add variables for length and another string

Add an integer variable called length and a character array called copy with size 10.

C

#include 
#include 

int main() {
    char name[] = "Alice";
    // Add length and copy variables below
    
    return 0;
}

Need a hint?

Use int length; and char copy[10]; to declare the variables.

3

CORE LOGIC: Use library functions to get length and copy string

Use strlen to set length to the length of name. Use strcpy to copy name into copy. Also create a character array called other with the value "Bob" and use strcmp to compare name and other, storing the result in an integer variable called cmp.

C

#include 
#include 

int main() {
    char name[] = "Alice";
    int length;
    char copy[10];
    // Use strlen, strcpy, and strcmp below
    
    return 0;
}

Need a hint?

Use length = strlen(name);, strcpy(copy, name);, and cmp = strcmp(name, other);.

4

OUTPUT: Print the results

Print the length of name using printf with the message Name length: . Print the copied string copy with the message Copied name: . Print the comparison result cmp with the message Comparison result: .

C

#include 
#include 

int main() {
    char name[] = "Alice";
    int length;
    char copy[10];
    length = strlen(name);
    strcpy(copy, name);
    char other[] = "Bob";
    int cmp = strcmp(name, other);
    // Print the results below
    
    return 0;
}

Need a hint?

Use printf to show the length, copied string, and comparison result.