Can you give me some examples of string manipulation in C++?

Can you give me some examples of string manipulation in C++?

Sure! Here are a few examples of string manipulation in C++ using the standard library:

1. Concatenation: You can concatenate strings using the + operator.

   std::string str1 = "Hello, ";
   std::string str2 = "World!";
   std::string result = str1 + str2; // result is "Hello, World!"
   

2. Length: To get the length of a string, use the length() method.

   std::string str = "Hello";
   std::cout << str.length(); // Outputs: 5
   

3. Substring: You can extract a substring using the substr() method.

   std::string str = "Hello, World!";
   std::string sub = str.substr(7, 5); // sub is "World"
   

4. Finding a character: Use the find() method to locate a character or substring.

   std::string str = "Hello, World!";
   size_t pos = str.find('W'); // pos is 7
   

Let me know if you need more examples!

That's great! Can you show me how to convert a string to an integer?

Absolutely! You can convert a string to an integer using the std::stoi function. Here's an example:

std::string str = "12345";
int num = std::stoi(str); // num is 12345

If the string cannot be converted, it will throw an exception, so make sure to handle that if necessary!

What about converting an integer back to a string?

You can convert an integer back to a string using the std::to_string function. Here's how:

int num = 12345;
std::string str = std::to_string(num); // str is "12345"

This is a straightforward way to perform the conversion!