预期表达式出现错误？

Question

在这里，我尝试在GLKVector2Add值中插入一个值，但错误在此行中缺少预期的表达式。

GLKVector2 self.position = GLKVector2Add({-200.695, 271},{-803.695, 0});  //Error - Expected expression

Answer 1

Try creating " GLKVector2 " variables, setting them and then passing those as arguments in your call to " GLKVector2Add ". It may be that the compiler simply doesn't know what to do with "{-200.695,271}" (a mix of float and integer numbers).

Answer 2

You must add them using GLKVector2Make .

So, your code will be:

GLKVector2 position = GLKVector2Add(
                      GLKVector2Make(-200.695, 271), 
                      GLKVector2Make(-803.695, 0));