synx.c

#include <stdio.h>
int
main(int argc, char *argv[])
{
    char c[]="wat is this, because this is a lie",*a=&c[0],*b=&c[0]+(sizeof c-1);
    while(a<--b){*a=*a+*b;*b=*a-*b;*a=*a-*b;a++;}
    printf("%s\n",c);
    return 0;
}

/*
[mjard@jard ~]$ gcc -g -Wall -pedantic synx.c
[mjard@jard ~]$ ./a.out 
eil a si siht esuaceb ,siht si taw
*/