1 2 #include <stdio.h> 3 #include <stdlib.h> 4 5 char* p; 6 ddd(void)7void ddd ( void ) { p[-1] += 'z'; } ccc(void)8void ccc ( void ) { ddd(); } bbb(void)9void bbb ( void ) { ccc(); } aaa(void)10void aaa ( void ) { bbb(); } 11 zzzzzzz(void)12void zzzzzzz ( void ) { p = malloc(10); } yyy(void)13void yyy ( void ) { zzzzzzz(); } xxx(void)14void xxx ( void ) { yyy(); } www(void)15void www ( void ) { xxx(); } 16 main(void)17int main ( void ) { www(); aaa(); return 0; } 18