c语言数据结构分析7之 二分查找

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct test{
	char* name;
	int age;
	int qq;
} date[]={
	{
		"solq",18,33333
	},
	{
		"wei cheng",20,444444	
	},
	{
		"hong",55,5555555
	}
};
int sreach(struct test* ar,char* name);
int main(int argc, char* argv[])
{

	int index=sreach(date,"solq");
	if(index<0) return 0;
	printf("name:%s\n",date[index].name);
	printf("age:%d\n",date[index].age);
	printf("qq:%d\n",date[index].qq);
	return 0;
}
int sreach(struct test* ar,char* name)
{
	int l,r,m,n=3;
	l=0;
	r=n-1;
	
	while(l<=r)
	{		
		m=(l+r)/2;
		if(strcmp(ar[m].name,name)==0)
			return m;
		else if (strcmp(ar[m].name,name)<0)		
			l=m+1;
		else		
			r=m-1;		
	}
	return -1;
}