Function CountCharInFileImpl

demo_example/ReadFiles.cpp:39–46

The *Impl is not the key point for this example, code readers could ignore this.

// The *Impl is not the key point for this example, code readers
// could ignore this.
uint64_t CountCharInFileImpl(const FileName &File, char c) {
    uint64_t Ret = 0;
    std::ifstream infile(File);
    std::string line;
    while (std::getline(infile, line))
        Ret += std::count(line.begin(), line.end(), c);
    return Ret;
}

uint64_t CountCharInFiles(const std::vector<FileName> &Files, char c) {
    uint64_t ReadSize = 0;