Here are some C idioms that may be usefull.
Place \0 at the location pointed to by ptr
then increment ptr
*ptr++ = '\0'; |
Increment ptr then
place \0 at the location pointed to by ptr
*++ptr = '\0'; |
This program will print its self! I guess its not of any real use, but I think its clever.
main(a) {a="main(a) {a=%c%s%c;printf(a,34,a,34);}";printf(a,34,a,34);}
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This is something I saw out on the web. It swaps the value of two variables without using a third variable as a temporary store.
one ^= two; two ^= one; one ^= two; |
Have you ever had a SEGV from printf because you passed a NULL pointer to a %s flag???. This idiom will put a stop to all that nonsence.
printf("%s\n", Str ? Str : "Null");
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Program swapping the contents of two variables.
Common Coding Errors.
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