how to do pointer typecast?

[karthik141]

I am working on console application in visual studio 2008.
I want to read a value from console window which is of form "T_414_A" which is a macro internal to the code and is defined as some hexadecimal value. how to get that macro value?

the code which i tried is as follows:
typedef unsigned long UINT32;
typedef unsigned char UINT8;
void * text_data_vp;
UINT32 * bit_format_ref;
UINT8 Size;

printf("Enter the dynamic_data_vp value: ");
scanf("%d", &text_data_vp);
bit_format_ref = ((UINT32 *)&text_data_vp);
Size = HmStrLngTable1[*bit_format_ref];

from the value i get i need to get some other value from the "HmStrLngTable1" array?

[johny10151981]

You cannot change or set the value of a macro in runtime, because macro is processed in compile time only

[karthik141]

probably i think you didn't understand what i have asked. i am trying to read the name of the macro from compile and and trying to get the value of macro which i have already written in the code.

[weaknessforcats]

The macro name is not in your compiled code. What is in your compiled code is the value of the macro.

Remember, a macro is a compile time evaluation. You source code is copied to a new file that contains the original code except the macro name is replaced by the value of the macro. This new temporary file is called a translation unit and it is this file that is compiled.

[johny10151981]

Thanks weaknessforcats for finding the right word