• Course: https://www.linkedin.com/learning/c-plus-plus-essential-training-15106801/quiz/urn:li:learningApiAssessment:48857406?autoSkip=true&autoplay=true&resume=false&u=214954586

If you are encountering an error like:

fatal error: format: No such file or directory
    1 | #include <format>
      |          ^~~~~~~~

That is because your compiler gcc is an older version. You can solve it by installing libfmt-dev:

sudo apt update
sudo apt install libfmt-dev

Then to include this into your software, instead of writing

#include <format>

you need to use the following two(!) lines:

#define FMT_HEADER_ONLY
#include <fmt/format.h>

You can test this with the following program:

#define FMT_HEADER_ONLY
#include <fmt/format.h>
#include <iostream>

using fmt::v6::print; // Use this rather than std::format
using std::cout;

int main()
{
    cout << "The tenth prime is\n";
    print("hello world!\n");
}