#include <iostream>using namespace std;char const *keyword[]={"do","for","switch","return","while"};int lookup_keyword(const char * const des,char const *keyword_table[],int constsize){		const char **kwp;	for (kwp=keyword_table;kwp<keyword_table+constsize;kwp++)	{		if (strcmp(*kwp,des)==0)		{			return kwp-keyword_table;		}	}	return -1;}void main(){	cout<<lookup_keyword("while",keyword,5);}