initializing a **Array and what actually need to be in the title so it goes through

Question

A function I want to use requires an input of a float ** array.

How can i initialize this to be a 2x2 array?

Just using float[2][2] = {{0,100},{0,200}} obviously doesn´t work.

I also tried

float** ranges = new float*[2];
ranges[0] = {0,100};
ranges[1] = {0,200};

`float[2][2] = {{0,100},{0,200}} ` --> `float ranges[2][2] = {{0.0,100.0},{0.0,200.0}}; ` — Sourav Ghosh, Nov 18 '15 at 15:52
the title is befor the and. I need to get the values int here and dont lnow how basically — Eumel, Nov 18 '15 at 15:54

score 0 · Accepted Answer · answered Nov 18 '15 at 15:57

float** ranges = new float*[2];
ranges[0] = {0,100};
ranges[1] = {0,200};

doesn't work since:

The RHS is an initilaization list that cannot be assigned to a pointer.
range[0] and range[1] are pointers for which memory needs to be allocated first. And then, you can assign values to individual elements.

You can use:

ranges[0] = new float[2]{0,100};
ranges[1] = new float[2]{0,200};

or

ranges[0] = new float[2];
ranges[0][0] = 0;
ranges[0][1] = 100;
ranges[1] = new float[2];
ranges[1][0] = 0;
ranges[1][1] = 200;

Of course, make sure to add code to delete them.

1 Answers1