state two different ways to store sparse matrices.C++?

Answer 1

You can write a class that includes both the key and the value. The key in this case would be the fields that would normally be the indexes into your non-sparse matrix. For instance, if you have a 2-dimensional matrix, you might index it as (x,y). Thus, your class would include:

int x;
int y;
int value;

You can then store these values in an array sized exactly for how many you have.

Alternatively, you can use a hash table where the key is a string composed like:

x (as a string) + "+" + y (as a string).

Answer 2

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Answer 3

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