Using an int variable in system() function c-CodePudding

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

CodePudding user response：

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.

CodePudding user response：

system("echo "a" "); the operator a is unknow.

You can passe an argument with " only if you add \.

Exemples :

system("echo \"a\" ");

system("echo \"a\" \"a second argument with spaces\"");