anyway to delete only part of array?

char myWord[20];

I want to delete last 10 chars of this array, I mean freeing the memory thats being used by last 10 chars. Is there anyway to do this ?

Heres an example function for substring where it might be useful.

str& substring(uint Start, uint Count){
    for(uint x=0; x<Count; x++){
        mString[x] = mString[x+Start];
    }  
    // SOMEHOW FREE MEMORY OF mString FROM [Start+Count] TO [mLength]
    mLength = Count;
开发者_如何学Go    return *this;
}

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No, not really. You can really only do it if you obtained a pointer to memory from malloc, and then used realloc to change the size, but I'm quite sure that it's not even guaranteed that it will free the unused bytes.

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With stack-allocated arrays¹, no. You can only use some special character to mark the "logical end" of the array; for strings usually the NUL character (0) is used.

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1. And even with stuff allocated on the heap usually you don't have that much granularity in allocations to free just 10 bytes of a 20-bytes long string.