#include <string>
    #include <algorithm>
    #include <iostream>
    #include <cstring>
    #include <cctype>
 
    using namespace std;
 
    struct is_char_category_in_question {
        bool operator()(const char& c) const {
            return std::ispunct(c) || std::isspace(c);
        }
    };
 
    int main() {
        static char str1[100] = "str,, ing";
    	size_t size = strlen(str1);
 
        remove_if(&str1[0], &str1[size + 1], is_char_category_in_question());
 
    	cout << str1 << endl;
    }
 
 

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