Question

How to use function with default parameter values in C++

Answer 1

#include <iostream>

void f(std::string str1, std::string str2 = "Programming") {
    std::cout << str1 + " " + str2;
}

int main()
{
    f("C++");
    std::cout << "\n";
    f("C++", "C");
}
 
 
 
 
/*
run:
 
C++ Programming
C++ C

*/

 

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Answer 2

#include <iostream>

void f(std::string str = "Programming") {
    std::cout << str;
}

int main()
{
    f();
    std::cout << "\n";
    f("C++");
}
 
 
 
 
/*
run:
 
Programming
C++

*/

 

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