1 files changed, 46 insertions, 0 deletions
diff --git a/challenge-253/witawayar/cpp/ch-1.cpp b/challenge-253/witawayar/cpp/ch-1.cpp
new file mode 100644
index 0000000000..9f0c138e5e
--- /dev/null
+++ b/challenge-253/witawayar/cpp/ch-1.cpp
@@ -0,0 +1,46 @@
+// g++ -Wall -Wextra -Wpedantic -std=c++17 cpp/ch-1.cpp
+#include <algorithm>  // remove_if
+#include <iostream>   // cout
+#include <sstream>    // stringstream
+#include <vector>
+
+std::vector<std::string> fun(std::vector<std::string> const& words, std::string separator) {
+    std::vector<std::string> parts;
+    std::size_t sep_size = separator.size();
+
+    for (auto& sub_word : words) {
+        std::size_t start = 0;
+        for (size_t found = sub_word.find(separator);
+             found != std::string::npos;
+             found = sub_word.find(separator, start)) {
+            parts.emplace_back(sub_word.begin() + start, sub_word.begin() + found);
+            start = found + sep_size;
+        }
+        if (start != sub_word.size())
+            parts.emplace_back(sub_word.begin() + start, sub_word.end());
+    }
+    parts.erase(std::remove_if(parts.begin(), parts.end(), [](std::string const& str) {
+        return str.find_first_not_of(' ') == std::string::npos; }), parts.end());
+
+    return parts;
+}
+
+int main(void) {
+    // Tests
+    std::vector<std::pair<std::pair<std::vector<std::string>, std::string>, std::vector<std::string>>> tests = {
+        {{{"one.two.three", "four.five", "six"}, "."}, {"one", "two", "three", "four", "five", "six"}},
+            {{{"$perl$$", "$$raku$"}, "$"}, {"perl", "raku"}}
+    };
+
+    for (const auto& [input, expected_output] : tests) {
+        auto [words, separator] = input;
+        auto got = fun(words, separator);
+        if (got != expected_output) {
+            std::stringstream error_msg;
+            error_msg << "Failed at " << separator;
+            throw std::runtime_error(error_msg.str());
+        }
+    }
+
+    std::cout << "done-testing, success\n";
+}