Multidimension array as function parameter

[qzou666]

Hi,

I have a c++ programme as follow:

void AFunction(float** p){ .....};

float p1[4][4]={{1.0f,0.7407f,0.2593f,0.0f},
{0.0f, 0.2593f, 0.7407f, 1.0f},
{0.0f, 0.1481f, 0.0741f, 0.0f},
{0.0f,-0.0741f,-0.1481f,0.0f}};

AFunction(p1);

When I compile, I was told:

cannot convert parameter 1 from 'float [4][4]' to 'float ** '

Would anyone explain why.

Thanks a lot

Qian

 

[Jeffray]

the type of p1 is float *. you should call it as
AFunction(&p1);

or change the definition of AFunction as:
AFunction(float *)

 

[qzou666]

Thank you very much, Jeffray.

I tried your suggestion

(1)for 'call it as AFunction(&p1)'

The compiler tell me

cannot convert parameter 1 from 'float (*)[4][4]' to 'float ** '

(2)for 'change the definition of AFunction as:
AFunction(float *)'

I have to use expression such as p[3][3] in the function, the float * seems not work.

Can you think of any thing else to solve my problem.

Cheers

 

[BobbyB]

void AFunction(float p[4][4]){ .....};

will do the job if it's ok with you to always receive a 4 by 4 array...

hope this will help...

 

[qzou666]

Thank you, BobbyB.

Your suggestion works when I ony use the array with fixed index range.

However, I need to use the arrays with different index ranges as the function parameter.

Can you think of any other answer to this situation.

Cheers.

 

[Leibnitz]

void AFunction( float p[][4]){ .....};
This should work !