int func(int n){ printf("func n:%d=========/n", n); if(n == 0) return 0; else return 1;}
char* func1(int n, char* str){printf("func n:%d, %s=========/n", n, str); if ( n == 1) return str; else return NULL;}
int func(int n){ printf("func n:%d=========/n", n); if(n == 0) return 0; else return 1;}
char* func1(int n, char* str){printf("func n:%d, %s=========/n", n, str); if ( n == 1) return str; else return NULL;}