Find The First Occurrence Of A Character In A String In C++

In C++, there are various methods available to find the first occurrence of a character in a string. In this guide, we will explore how to achieve this using some simple C++ code.

Code snippet to find first occurrence of a character in a string

Here’s a simple C++ code snippet that can help you to find the first occurrence of a character in a string.

#include <iostream>
#include <string>

int main()
{
   std::string str = "Example string";
   char ch = 'e';

   size_t found = str.find(ch);
   if (found != std::string::npos)
      std::cout << "First occurrence of " << ch << " is found at position: " << found << '\n';
   else
      std::cout << ch << " is not found in the string.\n";

   return 0;
}

Code Explanation to find first occurrence of a character in a string

This code snippet demonstrates a simple C++ program to determine the position of the first occurrence of a specific character in a string.

• We start by including the necessary libraries: <iostream> and <string>. The <iostream> library allows us to use std::cout and std::cin, and <string> enables to us to work with string data type.

• In the int main() function, we initialize a string str with the text “Example string” and a character ch with ‘e’.

• Then, we use the find() function from the standard string library. This function returns the position of the first occurrence of the input character in the string. If the character is not found, the function returns std::string::npos.

• The if statement checks whether the character was found. If found is not equal to std::string::npos, that means the character is present in the string and we print its position. If it matches std::string::npos, that indicates the character was not found in the string, and we print a suitable message.

• Finally, return 0; indicates that the program has executed successfully.

This simple yet robust method is an effective way to find the first occurrence of a character in a C++ string.