How to pass a string as default argument in C++

Question

How can I properly pass a const string, for example: "Hello" as a default parameter to a constructor without getting any warnings and errors? In other words how can I preserve memory for them before the function is called?

@arrowd One major one is:C:...\main.cpp|26|warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]| — Friendly Fella, Mar 09 '17 at 06:16

score 1 · Accepted Answer · answered Mar 09 '17 at 06:29

1

#include <iostream>

const char *defString = "Hello";
void foo(const char *str = defString) {
    std::cout << str;
}

int main() {
    foo();
    foo("Hello, world!\n");
}

answered Mar 09 '17 at 06:29

Zefick

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Is there no other way? What if I want to give the str sth made of 50 characters in the function??? (Without using "new" keyword to allocate memory) – Friendly Fella Mar 09 '17 at 06:38

How to pass a string as default argument in C++

1 Answers1