How to Parse a Comma-Separated String into an Integer Array in C ?

Parsing Comma-separated Strings into Integer Arrays

In C , parsing a comma-separated string into an integer array can be achieved using the following steps:

1. Read one number at a time: Use an input stream (std::istringstream) to read numbers from the string character by character.
2. Check for commas: After reading a number, check if the next character is a comma (','). If so, ignore it.
3. Push numbers into an array: Iterate over the input stream until all numbers are extracted. Store each number in a dynamically growing array (e.g., std::vector).

Here's an example code snippet that demonstrates this approach:

#include <vector>
#include <string>
#include <sstream>
#include <iostream>

int main()
{
    std::string str = "1,2,3,4,5,6";
    std::vector<int> vect;

    std::stringstream ss(str);

    for (int i; ss >> i;) {
        vect.push_back(i);    
        if (ss.peek() == ',')
            ss.ignore();
    }

    for (std::size_t i = 0; i < vect.size(); i++)
        std::cout << vect[i] << std::endl;
}

Output:

1
2
3
4
5
6

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