Split A String By A Delimiter In C++

In the world of programming, there are several operations that need to be performed on strings in order to manipulate or analyze them. One such common operation is splitting a string by a delimiter. In this article, we will discuss how to split a string by a delimiter in C++.

Code Snippet: Splitting a String by a Delimiter in C++

#include <string>
#include <sstream>
#include <vector>
#include <iterator>

std::string sentence = "This is a sentence";
char delimiter = ' ';
std::istringstream iss(sentence);
std::vector<std::string> words(std::istream_iterator<std::string>{iss},
                               std::istream_iterator<std::string>{});

for(auto word : words) {
    std::cout << word << std::endl;
}

Code Explanation: Splitting a String by a Delimiter in C++

What this code does is it takes a string, applies a delimiter, and splits the string into smaller strings based on where the delimiter is found.

The first four lines are about including the necessary libraries.

#include <string>
#include <sstream>
#include <vector>
#include <iterator>

Then, we declare a sentence we want to split and the delimiter we want to split by (in this case, a space).

std::string sentence = "This is a sentence";
char delimiter = ' ';

After this, we are using the istringstream class from the <sstream> library to perform operations on the string where we would split the sentence.

std::istringstream iss(sentence);

Next, using the istream_iterator class from the <iterator> library, we put the split words into a vector. The istream_iterator class allows the input string to be treated as a stream, and it can then iterate over the string word by word.

std::vector<std::string> words(std::istream_iterator<std::string>{iss},
                               std::istream_iterator<std::string>{});

Lastly, we use a for-loop to iterate over the vector, which contains the split string, and print each word on a new line.

for(auto word : words) {
    std::cout << word << std::endl;
}

When run, this code will output each word in the sentence on a new line. Overall, this is a simple and efficient way of splitting a string by a delimiter in C++.