替换字符串一次(循环多次）

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#include <stdio.h> #include <time.h> #include <malloc.h> #include <string.h> int StrReplace(char * srcstr, const char * oldstr, const char * newstr) {     char    *tmpbuffer;     int     prelen, postlen, totallen, newlen, oldlen;     char    *ptr;     char    *tmpchar;       tmpchar = strstr(srcstr, oldstr);     if (tmpchar == NULL)    return 0;       totallen = (int)strlen(srcstr);     oldlen = (int)strlen(oldstr);     newlen = (int)strlen(newstr);       prelen = (int)(tmpchar - srcstr);     postlen = totallen - prelen - oldlen;     tmpchar += oldlen;       tmpbuffer = (char*)malloc(prelen + newlen + postlen + 1);     if (tmpbuffer == NULL)  return -1;       ptr = tmpbuffer;     memcpy(ptr, srcstr, prelen);     ptr += prelen;     memcpy(ptr, newstr, newlen);     ptr += newlen;     memcpy(ptr, tmpchar, postlen);       tmpbuffer[prelen + newlen + postlen] = 0;     strcpy(srcstr, tmpbuffer);     srcstr[prelen + newlen + postlen] = 0;     free((void*)tmpbuffer);     return 1; } #include <iostream> using namespace std; int _tmain(int argc, _TCHAR* argv[]) {     char mystr[80] = "i am love you good you";     while(StrReplace(mystr, "you", "me"));     cout << mystr << endl;     system("PAUSE");     return 0; }