However we aren't comparing languages here but standard libraries.
If we introduce modules in C instead of header files and add some simple data structures and algorithms to stdlib, I can see C being simpler.
C++ has data structures in its standard library and will have modules starting with C++20.
Rust:
let mut map = HashMap::new();
map.insert("foo", "bar");
println!("Value: {}", map.get("baz").unwrap_or("<none>"));
Dictionary<string, string> dict = new Dictionary<string, string>();
dict.Add("foo", "bar");
try {
Console.WriteLine("Value: {0}", dict["baz"]);
} catch (KeyNotFoundException) {
Console.WriteLine("Value: <none>.");
}
[1]: https://docs.microsoft.com/en-us/dotnet/api/system.collectio...
var dict = new Dictionary<string, string> { ["foo"] = "bar" };
Console.WriteLine($"Value: {dict.GetValueOrDefault("baz", " <none>.")}");