Hidden Features of C++? [closed]

Answer 1

Getting rid of forward declarations:

struct global
{
     void main()
     {
           a = 1;
           b();
     }
     int a;
     void b(){}
}
singleton;

Writing switch-statements with ?: operators:

string result = 
    a==0 ? "zero" :
    a==1 ? "one" :
    a==2 ? "two" :
    0;

Doing everything on a single line:

void a();
int b();
float c = (a(),b(),1.0f);

Zeroing structs without memset:

FStruct s = {0};

Normalizing/wrapping angle- and time-values:

int angle = (short)((+180+30)*65536/360) * 360/65536; //==-150

Assigning references:

struct ref
{
   int& r;
   ref(int& r):r(r){}
};
int b;
ref a(b);
int c;
*(int**)&a = &c;