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7.7

pointers and copy on write

Asked by kuntilanak in C++ Programming Language, C Programming Language

I guess I've asked a question related to this here. I am implementing a polynomial class and trying to implement it as a copy on write. I am particularly confused with the following situation..

After I do a[2] then b and c should also be 120x^2 + 10x + 90 right?

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             Polynomial a,b,c 
//initially a is 2x^2 + 10x + 90
a.initPolynomial("2x^2 + 10x + 90"); 
b = a;
c = a; 
//change the coefficient of the second power to 120 so it 
//now becomes 120x^2 + 10x + 90
a[2] = 120;

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pointers and copy on write

Asked by kuntilanak in C++ Programming Language, C Programming Language

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