Assignment operator get the error.

[EthanChu]

Please kindly help. Thanks
I got the error message  -> Parse issue: Expected expression

int i1, i2 = -150;
        i1 = 5;                 //error
        i2 / = i1 + i1;      //error                                 
        i2 / = 75 + 25;   //error

Any setting in Xcode i need to known?π

[EthanChu]

  I found the problems
The assignment operator
 a /= b + c; ---> it's ok. But
 a / = b + c; ----> It's fail, the space between "/" and "=" will got the error.