## INDEX

### Pointer to array of array in c

Examples of pointer to array of array in c:

What will be output if you will execute following code?

#include<stdio.h>
int main(){

static float farray[]={0.0f,1.0f,2.0f,3.0f,4.0f,5.0f,6.0f,7.0f,8.0f};
float (*array)={&farray,&farray,&farray};
float (*(*ptr)[])=&array;

printf("%f ",2[(*(**ptr+1))]);

return 0;
}

Output: 5.000000
Explanation:

In this example:

farray []: It is two dimension array and its content are float constants.

array :It is one dimension array and its content are address of such one dimension array which content are float constant.

ptr: It is pointer to one dimension array which content are address of such one dimension array which content are float constant.

Pictorial representation:
Note: In the above figure upper part of box represent content and lower part represent memory address. We have assumed arbitrary address.

2[(*(**ptr+1))]
= (*(**ptr+1)) 
= (*(**&array+1)) 
= (*(*array+1)) 
= (*(array  +1)) 
= (*(&farray  +1)) 
=&farray   
=*&farray  
=farray  

It is 1*(3) +2=5th element of farray starting from zero which is 5.0f

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#### 1 comment:

sk yakub said...

Can you point the difference between 'char** ptr' and 'char **ptr'?