Pointer to two dimentional array

Hi ,how can I do that

Code:

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double *px;
 px=a;

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when I do that is giving me -warning assignment from incompatible pointer type in c
a is two dimetional array of doubles

Code:

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double a[10][20];
double (*pa)[20] = a;  // a pointer to an array of 20 doubles

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Note that this is different from say

Code:

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double **pa; // pointer to pointer to double
double *pa[20]; // an array of 20 pointers to double

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Quote:

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Originally Posted by lio

Hi ,how can I do that

Code:

---

double *px;
 px=a;

---

when I do that is giving me -warning assignment from incompatible pointer type in c
a is two dimetional array of doubles

---

Code:

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// first assign px to actually point to something
double pv;
double *px = &pv;
// then provide array coordinates
*px = a[x][y];

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You can't assign an array to a single value.