给你两个字符串str1，str2，找出str2在str1中的位置

如题

题目参考链接：

http://blog.csdn.net/hxz_qlh/article/details/14110221

代码来自非原创

 #include <iostream>
 #include <cstdio>

 using namespace std;

 char *strstring(char *ParentString,char *SubString)
 {
     char *pSubString,*pParentString;
     for(char *pTmp = ParentString; *pTmp !='\0' ; pTmp++)
     {
         pSubString = SubString;
         pParentString = pTmp;
         while(*pSubString != '\0' && *pSubString == *pParentString)
         {
             pSubString++;
             pParentString++;
         }
         if(*pSubString == '\0')
         {
             return pTmp;
         }
     }
     return NULL;
 }

 int main()
 {
     cout << "Hello world!" << endl;
     char *ParentString = "I love TrendMicro!";
     char *SubString = "Trend";
     printf("%s\n",strstring(ParentString,SubString));
     return ;
 }