>#include <stdio.h>
>
>int main()
>{
>char *test = "Test";
>
>printf("%s\n", test);
>snprintf(test, 5, "Passed");
>printf("%s\n", test);
>
>return 0;
>}
>
>If you compile and run it - crash!

the wasy this is written, test is allocated as a char pointer on the
stack that points to a static (read-only) string.  you can printf()
it, but not snprintf() into it (write into it).

>If you change 'char *test' to 'char test[]' - works!

test in this case is allocated as a char array of length 5 on the
stack which is writeable.

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