Using an int variable in system() function c++

Question

I need using an int veriable in system() function for my c++ program. for example:

but i get an error and i need help about how i use this like that Error: C++ user-defined literal operator not found

Is the actual question: "How to convert an integer to string? And how to concatenate strings?" In that case the answer is `std::to_string` and `+` — 463035818_is_not_an_ai, Mar 02 '22 at 13:02

score 5 · Accepted Answer · answered Mar 02 '22 at 13:05

That's never going to work. C++ doesn't plug integers into strings that way. Instead, you can do:

int a = 42;
std::string s = "echo " + std::to_string (a);
system (s.c_str ());

Also, you might consult this page, in order to learn the language properly.

1 Answers1