1 #include "mystring.h" 2 #include <string.h> 3 find_first(char ch,size_t offset) const4 int mystring::find_first(char ch, size_t offset) const 5 { 6 if(offset >= rep->length) 7 return -1; 8 char* ptr = strchr(rep->buf+offset, ch); 9 return ptr ? ptr-rep->buf : -1; 10 } 11 12