How to print string and argument without space?

Question

Programming

How can you "glue" an argument to a string?
For example, in LUA you can do this:

i = "abc"
print("123"..i) --> "123abc"

How is this implemented in C or C++?

Answer 1

Can the same

std::string s = "abc";
std::cout << "123" + s;

Or you can use printf
For std::cout, you need to connect iostream, for printf - cstdlib