字符串逆序

#include <iostream>

using namespace std;

char* reset(char *pa)

{

if(pa == NULL)

{

return NULL;

}

else

{

char temp;

char *pch = pa;

while(*pch != '\0')

{

pch++;

}

pch--;

char *pb = pa;

while(pb != pch)

{

temp = *pch;

*pch = *pb;

*pb = temp;

pb++;

pch--;

}

}

return pa;

}

int main()

{

char str[] = "hello";

char* pch = reset(str);

cout<<str<<endl;

cout<<pch<<endl;

return 0;

}