Are there any numeric suffixes for specifying a double?

Question

void Foo(float  a){}  //1 void Foo(double a){}  //2 overloaded   Foo(1.0f);                           //calls function 1 Foo(1.0 /*double numeric suffix?*/); //calls function 2 

If not, is a cast the only way this can be achieved? I am mainly interested in ensuring double precision math during certain operations, etc:

ulong j; double v;  j = /*some value*/; if(j>0UL)   v = 1.0 / j;  //if 1.0 is set as a float by the compiler then                 //could it be likely we lose some precision here                  //if a double would allow for more precision?  Is                 //a cast the only means of ensuring double precision? 

Other tips on allowing the compiler to auto-determine the types during an operation would be helpful.

Answer 1

A suffix is unnecessary in C++. Any floating point value which lacks the 'f' suffix will be typed to the compiler type double by default.

Reference: http://en.wikipedia.org/wiki/C_0x