include iostream using namespace std int main string str1 The laborato

#include <iostream>

using namespace std;

int main() {
    string str1 = "The laboratory", str2 = "work", str3 = "№6", str4;

    str4 = str1 + " " + str2 + " " + str3;
    cout << "Result of merge str1, str2 and str3:" << endl << str4;
    return 0;
}