strcmp()源代码

#include
using namespace std;

int my_strcmp(const char *string1, const char *string2 )
{
  int ret;
  while((ret=*(unsigned char *)string1-*(unsigned char *)string2++)==0 && *string1++);
return ret;
}
int main()
{
  char a[] = "abch";
  char b[] = "abcha";
  cout << my_strcmp(a,b);
 return 0;
}