#include <stdlib.h> #include <string.h> // The issue here is the same one in memcmptest -- 'strchr' and 'index' are // aliases, as are 'strrchr' and 'rindex'. In each case, the shorter name // gets preferred, ie. 'index' and 'rindex'. int main(int argc, char* argv[]) { char *s, *a __attribute__((unused)), *b __attribute__((unused)); s = malloc(sizeof(char)); // Nb: s[0] is uninitialised, but almost certainly a zero a = strchr (s, '1'); b = strrchr(s, '1'); return 0;//((int)a + (int)b); }