using unary & operator on function return value

Question

I've wanted to apply unary '&' operator just behind function to operate on function return value. However, I get a compile-time error (I use gcc from MinGW) test.c: In function 'main': test.c:8:12: error: lvalue required as unary '&' operand I made a code to make my question easier to understand: ``` int function(); void function2(int *param); main() { function2(&function1()); } int function1() { return 10; } void function2(int *param) { return; } ``` This code creates same compile-time error. The question is: How I can use the '&' operator just from function2 "()", without other code elsewhere?

Accepted Answer

What you want can be achieved in C99 and later via:

```
function2((int[]){function1()});
```

i.e. making a compound literal containing the function return value.

using unary & operator on function return value

Solution

Problem