Problem hex string to char * ..

haha didn't know about the compiler helping people out haha

yah...but all langauges .net java are just proxys!! i dont like that **** i want native complication real assembly not bytecode

Quote:

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Originally Posted by Fuji22

I also got this done by myself a little problem with arrays now.. If I'd make a array like 5000 (guess size) then at the end It must be the same size as the hex value of ascii string. But okay here is my current code.

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If you want to use an array where you can specify the size of it at runtime, you can either use pointers and dynamically allocated memory, or use std::vector.

Code:

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char temp[(res/2)+sizeof(char)] = {0}; //allocate temp array <- the hell this giving me a array for error C2466: cannot allocate an array of constant size 0

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The same code using vector:

Code:

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#include <vector>
//...
std::vector<char> temp((res/2)+sizeof(char), 0);

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Then you use temp just like an array. Note there is no need for pointers, however there is a need to know what C++ facilities allow you to declare dynamic arrays without pointers, and vector (and for MFC, vector or CArray) are the ones that does this.

Code:

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char *p = strtok(strData, " ");  //split hex characters by space
int curPos = 0;
while(p != NULL)  //if pointer is not NULL
{
          temp[curPos]=(char)strtoul(p, NULL, 0x10);
          p = strtok(NULL, " ");
          curPos++;
}

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Also, realize that strtok() mangles the string you send to it, so your strData is not the same after you call strtok(). For example,

Code:

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char* temp=strdup(strData);

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This line in your program is highly suspicious.

Regards,

Paul McKenzie

Quote:

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Originally Posted by Fuji22

but why must I use pointers for such similar operations.

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You dont, but I thought I would try to keep the syntax similar for you.

Quote:

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Originally Posted by Fuji22

I already mastered Java but I can't find the power in java aka dll injection so thats why I switched to C.

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I like Java too, but C is a nice chizzle in the toolbox.

Quote:

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Originally Posted by Fuji22

if char blahlbah[30] works I dont get it.. aint pointers for functions and such so it will be less overhead on functions

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Well a pointer is just a variable that allows you to access the memory address it contains. It is pretty light.

Quote:

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Originally Posted by Fuji22

so Dynamic Allocation of arrays can't be done without pointers?

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You can depending on the types you use.

Quote:

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Originally Posted by Fuji22

wow.. why doesn't someone just make a new langauge thats just as powerful but without the hassle lol.

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I thought that was Java. :)

Might as well just learn to use your tools. You can get all the functionality out of them that you wish, although you will have to get out a book or two. Of course you could just do what Paul suggested.....although you should probably get a good C++ book.