VXi VT1529A/B 사용자 설명서

These subtle problems can be avoided by specifically including a decimal 
point in decimal constants where an integer operation is not desired. For 
example, if either of the constants in the division above is made into a float 
constant by including a decimal point, the translator would have promoted 
the other constant to a float value and performed a float divide operation 
resulting in the expected 0.75 * 12 or the value 8.0. So, the statement:

a = ( 3. / 4 ) * 12;

will result in the value float 8.0 being assigned to the variable "a."

All VT1422A variables, local or global, must be declared as static. An example:

static float gain_var, integer_var, deriv_var;

/* three vars declared */

In 'C', local variables that are not declared as static lose their values once the 
function completes. The value of a local static variable remains unchanged 
between calls to an algorithm. Treating all variables this way allows an 
algorithm to "remember" its previous state. The static variable is local in 
scope, but otherwise behaves as a global variable. Also, note that declaring 
variables within a compound statement is not permitted.

The VT1422A Algorithm Language allows the following data structures:

•

Simple variables of type float:

static float simp_var, any_var;

simp_var = 123.456;
any_var = -23.45;
Another_var = 1.23e-6;

Each simple variable requires four 16-bit words of memory.