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declarations, index is equal to zero by default.
Pointers to functions are not supported. If necessary, a table call can always be replaced with the
switch operator.
Multidimensional arrays are not supported. If it is necessary, you can write a couple of functions,
such as:
int GetElement(int array[], int index1, int index2);
Structures (and unions) are not supported. In fact, you can always do without structures. Structures
may be required for API Windows and user DLLs operations, but as a rule only experienced
programmers should do it, such as those who know how to reach structure elements. As a tip, there are
functions, such as memcpy, which receive a void "pointer").
Enumerated types ( enum ) are not supported #define.
#define half(x) (x / 2) , are not supported. The same operations can be done with functions.
Conditional operators such as x = y == 2? 3 : 4; , are not supported; the operator "comma" outside
variable declaration is not supported. For example,
int i = 0, j = 1; is supported, but
for (i = 0, j = 1; ...) is not supported.
User functions with a variable amount of parameters are not supported. However, there are many
system functions, such as printf, with a variable number of parameters.
Declaration of user function parameters such as void array[] is not supported. The system
functions such as memcpy, have such parameters.
Logical expressions are always fully computed. It is very important to remember it, as a situation
like
char array[10];
if (i < 10 && array[i] != 0)
array[i]   =   1;
will cause an error at the execution stage, if i is greater than 9, because the expression of array[i] will be
computed. In a standard compiler such an expression is not computed, because the condition of i > 10
would cancel any further processing of the expression.
Constant expressions are always computed during execution. For example, int i = 10 * 22 will be
computed not during compilation, but during execution.
The const key word is absent.
Static variables cannot be declared inside functions.
But
Variables can be declared anywhere, not just in front of the first executed operator. For example:
void main()
{
GlobalVar = 0;
int i = 1;
// will be OK as in C++
}
Nested comments are allowed.
Expressions like array = "1234" are allowed.
Default parameter values in declared functions, as in C++, are allowed. For example, void func
(char array[],int index = 0); . Expressions can also serve as default values, for example void func(char
array[], int index = func1() + 1); .
Expressions in global variable initializers are allowed. For example:
float table[] = { sin(0), sin(0.1) };
void main()
...
}
? 2010 Phyton, Inc. Microsystems and Development Tools
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