Can I return a initialized struct on one line in ANSI C?

Question

I just wanna know if I can do something like that...

typedef struct Result{
  int low, high, sum;
} Result;

Result test(){
  return {.low = 0, .high = 100, .sum = 150};
}

I know that is the wrong way, but can I do that or I need to create a local variable to receive the values and then return it?

Answer 1

You can do so by using a compound literal:

Result test(void)
{
    return (Result) {.low = 0, .high = 100, .sum = 150};
}

(){} is the compound literal operator and compound literal is a feature introduced in c99.