Real, float, numeric, and decimal types

CS_REAL corresponds to the Adaptive Server datatype real. It is implemented as a platform-dependent C-language float type:
```
typedef float                CS_REAL;      
```
CS_FLOAT corresponds to the Adaptive Server datatype float. It is implemented as a platform-dependent C-language double type:
```
typedef double               CS_FLOAT;     
```
CS_NUMERIC and CS_DECIMAL correspond to the Adaptive Server datatypes numeric and decimal. These types provide platform-independent support for numbers with precision and scale.

The Adaptive Server datatypes numeric and decimal are equivalent; and CS_DECIMAL is defined as CS_NUMERIC:
```
typedef struct  _cs_numeric
```
```
 {
```
```
     CS_BYTE                  precision;
```
```
     CS_BYTE                  scale;
```
```
     CS_BYTE                  array[CS_MAX_NUMLEN];
```
```
 } CS_NUMERIC;   
```
```
 
```
```
 typedef CS_NUMERIC           CS_DECIMAL; 
```
where:
- precision is the precision of the numeric value. Legal values for precision are from CS_MIN_PREC to CS_MAX_PREC. The default precision is CS_DEF_PREC. CS_MIN_PREC, CS_MAX_PREC, and CS_DEF_PREC define the minimum, maximum, and default precision values, respectively.
- scale is the scale of the numeric value. Legal values for scale are from CS_MIN_SCALE to CS_MAX_SCALE. The default scale is CS_DEF_SCALE. CS_MIN_SCALE, CS_MAX_SCALE, and CS_DEF_SCALE defines the minimum, maximum, and default scale values, respectively.
- scale must be less than or equal to precision.
CS_DECIMAL types use the same default values for precision and scale as CS_NUMERIC types.