Array and Pointers

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Snippet:
char *value="12345";
int size;

size = sizeof(value);

printf("1.value[%s], size[%d]\n", value, size);
strcpy(value, "67890");
printf("2.value[%s], size[%d]\n", value, size);
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Result:
1.value[12345], size[4]
Segmentation fault

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Snippet:
char value[]="12345";
int size;

size = sizeof(value);

printf("1.value[%s], size[%d]\n", value, size);
strcpy(value, "67890");
printf("2.value[%s], size[%d]\n", value, size);
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Result:
1.value[12345], size[6]
2.value[67890], size[6]