Split string

C
#include <cstring>
#include <iostream>
int main() {
    char input[100] = "A bird, came. down; the. walk";
    char *token = std::strtok(input, " ,.;");
    // string token = std::strtok(input, " ,.;");
    while (token != NULL) {
        std::cout << token << '\n';
        token = std::strtok(NULL, " ,.;");
    }
}

C++ STL
The first puts the results in a pre-constructed vector, the second returns a new vector.

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

template<typename Out>
void split(const std::string &s, char delim, Out result) {
    std::stringstream ss;
    ss.str(s);
    std::string item;
    while (std::getline(ss, item, delim)) {
        *(result++) = item;
    }
}

std::vector<std::string> split(const std::string &s, char delim) {
    std::vector<std::string> elems;
    split(s, delim, std::back_inserter(elems));
    return elems;
}