Printing 1 to 1000 without loop or conditionals
This one actually compiles to assembly that doesn't have any conditionals:
#include <stdio.h>#include <stdlib.h>void main(int j) { printf("%d\n", j); (&main + (&exit - &main)*(j/1000))(j+1);}
Edit: Added '&' so it will consider the address hence evading the pointer errors.
This version of the above in standard C, since it doesn't rely on arithmetic on function pointers:
#include <stdio.h>#include <stdlib.h>void f(int j){ static void (*const ft[2])(int) = { f, exit }; printf("%d\n", j); ft[j/1000](j + 1);}int main(int argc, char *argv[]){ f(1);}
Compile time recursion! :P
#include <iostream>template<int N>struct NumberGeneration{ static void out(std::ostream& os) { NumberGeneration<N-1>::out(os); os << N << std::endl; }};template<>struct NumberGeneration<1>{ static void out(std::ostream& os) { os << 1 << std::endl; }};int main(){ NumberGeneration<1000>::out(std::cout);}
#include <stdio.h>int i = 0;p() { printf("%d\n", ++i); }a() { p();p();p();p();p(); }b() { a();a();a();a();a(); }c() { b();b();b();b();b(); }main() { c();c();c();c();c();c();c();c(); return 0; }
I'm surprised nobody seems to have posted this -- I thought it was the most obvious way. 1000 = 5*5*5*8.