Navigating a character string array from pointers

This program loads 6 words into the array "keywords," then segfaults for some reason. Why does it do this?

Code:

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#include<stdlib.h>

int main()
{
        char** keywords = (char**) calloc(20, sizeof(char));
        int i = 0;
        for (i = 0; i < 20; i++)
                keywords[i] = (char*) calloc(80, sizeof(char));
        char string[] =
        { "Holy cow omg hey haha wow oh jeeze louise lolz." };
        char* p = NULL;
        char* c = string;
        int n = 0;

        p = *(keywords + 0);
        while (*c)
        {

                while (!isspace(*c) && *c)
                {
                        *p++ = *c++;
                }
                *p = '\0';
                if (!*c)
                        break;
                c++;
                n++;
                p = *(keywords + n);
                printf("%d\r\n", n);
        }

        for (n = 0; n < 10; n++)
                printf("%s\r\n", keywords[n]);

        free(keywords);
        return 0;
}

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sorry

Better yet, change it to:

Code:

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char** keywords = calloc(20, sizeof(*keywords));

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Quote:

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Originally Posted by laserlight

Better yet, change it to:

Code:

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char** keywords = calloc(20, sizeof(*keywords));

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This fixes the problem. Thanks!