pointer and array

[timhxf]

i have an array, let's say "float rain[5][12]", and i have a pointer "float *p", when I make the statement like this"p=rain", then I got a error saying imcompatible pointer type. could anyone explain why? thanks.

[Salem]

When you say p=rain, you're also saying p = &rain[0]
But rain[0] isn't a float, it is an array of 12 floats.

You can point to arrays (as a whole) using the following notation

#include <stdio.h>
#include <stdlib.h>

int main ( ) {
    float rain[5][12];
    float *p = &rain[0][0];
    float (*q)[12] = rain;
    q = &rain[0];  /* same again */

    *p = 123;
    printf("%f %f\n", rain[0][0], q[0][0] );
    return 0;
}

[whiteflags]

This could also help: http://c-faq.com/aryptr/pass2dary.html

[timhxf]

thanks, guys, i understand better!