43_指针的初始化

//_43_指针的初始化
//_43_main.cpp

//对于当前没有指向合法的内存位置的指针，为其赋值为零

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int search(char *p[],char *name);

//给字符型的指针数组赋初值
char *names[] = {
	"Herb","Rex","Dennis","John",NULL};//NULL指针标志数组内容的结束

int main()
{
	if(search(names,"Herb")!=-1)
		printf("Herb is in list.\n");
	if(search(names,"Mary")==-1)
		printf("Mary not found.\n");
	system("pause");
	return 0;
}

int search(char *p[],char *name)
{
	register int t;
	for(t=0;p[t];++t)//p[t]不为NULL的情况
		if(!strcmp(p[t],name))
			return t;
	return -1;
}