How Can I Efficiently Separate Comma-Delimited Strings in C ?

Separating Comma-Delimited Strings Using Stringstream

In the provided problem, the task is to separate a comma-delimited string into individual tokens. While the stringstream::operator can effortlessly separate words by spaces, it falls short when it comes to commas.

To overcome this challenge, we employ a modified approach:

#include <iostream>
#include <sstream>

int main() {
  std::string input = "abc,def,ghi";
  std::istringstream ss(input);
  std::string token;

  // Use getline to separate by commas
  while (std::getline(ss, token, ',')) {
    std::cout << token << '\n';
  }

  return 0;
}

In this modified code:

• We use std::getline instead of std::stringstream::operator>>. getline can extract substrings up to a specified delimiter (in this case, a comma).
• We iterate over the input stream until no more tokens are found.
• For each token, we print it on a new line.

The output accurately separates the input string into individual tokens:

abc
def
ghi

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