C puzzles

Fun stuff , thanks for posting it. I've been getting back into C lately, iterating through implementing common algorithms from scratch. In spite of the kinds of easy to make mistakes that are highlighted on the site, I'm finding it to be a lot of fun - not having my hand held by frameworks that try to stop me from shooting myself in a foot is refreshing and brings back that feeling of "I can build whatever the hell I…

> Write a C program which prints Hello World! without using a semicolon Here's one way, cheating a bit by abusing the definition of "a C program which prints": /tmp$ gcc hw.c hw.c:1:2: warning: #warning Hello world! [-Wcpp] #warning Hello world! A more serious solution, though: /tmp$ cat hw.c #include <stdio.h> void main(void) { if (puts("Hello world!")) {} } /tmp$ gcc hw.c /tmp$ ./a.out Hello world!