C Language Question

Question

What is difference between array of pointer and pointer to an array in respect of multidimensional array? Please explain with simple codes in both cases.

Vulpes · Answer

The following example may help to make the distinction clear: #include int main() { int i, j; /* create 2 dimensional array of ints */ int a[2][2] = {1, 2, 3, 4}; /* create pointer to array */ int *pa = &a[0][0]; /* create 2 dimensional array of pointers to int and initialize it */ int *api[2][2]; api[0][0] = &a[0][0]; api[0][1] = &a[0][1]; api[1][0] = &a[1][0]; api[1][1] = &a[1][1]; /*iterate through int array using pointer*/ for(i = 0; i for(j = 0; j printf("%d ", *pa++); printf("
"); /*iterate through pointer array and dereference the elements */ for(i = 0; i for(j = 0; j printf("%d ", *api[i][j]); return 0; } As expected the output is: 1 2 3 4 1 2 3 4

Kailash Chandra Behera · Answer

Hi Nilesh visit the below links may help your http://stackoverflow.com/questions/6474104/difference-between-pointer-to-pointer-and-pointer-to-array http://stackoverflow.com/questions/16692887/difference-between-array-and-pointer

Santhosh Subramaniam · Answer

Hi Refer this link http://en.wikibooks.org/wiki/C_Programming/Pointers_and_arrays

C Language Question

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