C++ String strpbrk() Function

Posted in C++ Tutorial

Updated on Jan 15, 2024

By Mari Selvan

👁️ 59 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

🙋 Introduction

In C++ programming, manipulating and searching strings are common tasks.

The strpbrk() function is a useful string manipulation function that searches for the first occurrence of any character in a specified set within a given string.

In this tutorial, we'll explore the usage and functionality of the strpbrk() function in C++.

💡 Syntax

The signature of the strpbrk() function is as follows:

Syntax

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const char* strpbrk(const char* str1, const char* str2);

This function takes two C-style strings (str1 and str2) and returns a pointer to the first occurrence in str1 of any character from str2, or a null pointer if no match is found.

📄 Example

Let's delve into an example to illustrate how the strpbrk() function works.

strpbrk.cpp

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#include <iostream>
#include <cstring>

int main() {
  const char * str1 = "Hello, World!";
  const char * str2 = "aeiou";

  // Find the first occurrence of a vowel in str1
  const char * result = strpbrk(str1, str2);

  // Output the result
  if (result != nullptr) {
    std::cout << "First vowel found: " << * result << std::endl;
  } else {
    std::cout << "No vowel found." << std::endl;
  }

  return 0;
}

💻 Output

Output

First vowel found: e

🧠 How the Program Works

In this example, the strpbrk() function searches for the first occurrence of any vowel ('a', 'e', 'i', 'o', or 'u') in the string "Hello, World!" and prints the result.

↩️ Return Value

The strpbrk() function returns a pointer to the first occurrence of any character from the set str2 in the string str1. If no match is found, it returns a null pointer (nullptr).

📚 Common Use Cases

The strpbrk() function is useful when you need to find the first occurrence of any character from a specified set within a string. It simplifies tasks such as searching for specific characters in a text.

📝 Notes

The strpbrk() function is part of the C library and can be used with C++.
If you need to find the first occurrence of a specific character in a string, consider using functions like std::find from the C++ Standard Library.

🎢 Optimization

The strpbrk() function is optimized for searching for any character in a set within a string. Consider optimizing your overall algorithm if performance is critical.

🎉 Conclusion

The strpbrk() function in C++ is a valuable tool for searching strings for the first occurrence of any character from a specified set. It provides a convenient way to perform such searches efficiently.

Feel free to experiment with different strings and sets to explore the behavior of the strpbrk() function in various scenarios. Happy coding!