第2个回答 2010-05-05
#include <iostream.h>
#include <string.h>
int main()
{
char ch[]="book";
char *p="";
int len1,len2;
len1=strlen(ch);
if(len1!=0)
cout<<" \nnot null.";
else
cout<<"\n is null";
len2=strlen(p);
if(len2!=0)
cout<<"\nnot null.";
else
cout<<"\n is null";
return 0;
}本回答被网友采纳