Supported data types passed using C++ pointers (by reference)

Table 1 identifies the data types that can be passed as parameters between C++ and PL/I applications with the use of explicit pointers under C++. Parameters that are pointers are passed by reference to PL/I. Conversely, reference parameters passed by PL/I to C++ are received as pointers to the equivalent data type or as a C++ reference variable such as int& i.

Anything that is passed with a pointer can be passed with a reference variable; the effect is the same. Reference variables are generally easier to use.

Table 1. Supported data types between C++ and PL/I using C++ pointers (by reference)
C++	PL/I
signed short int	REAL FIXED BINARY(15,0)
signed int	REAL FIXED BINARY(31,0)
signed long int	REAL FIXED BINARY(31,0)
float	FLOAT DECIMAL(06) FLOAT BINARY (21) is the preferred equivalent for float.
double	FLOAT DECIMAL(16) FLOAT BINARY (53) is the preferred equivalent for double.
long double	FLOAT DECIMAL(33) FLOAT BINARY (109) is the preferred equivalent for long double.
pointer to . . .	POINTER
Note: Data storage alignment must match.