#include<stdio.h>
# define N 15
void main()
{
int i,number,top,bott,mid,loca,a[N],flag=1,sign;
char c;
printf("enter data:\n");
scanf("%d",&a[0]);
i=1;
while(i<N)
{scanf("%d",&a[i]);
if(a[i]>=a[i-1])
i++;
else
printf("enter this data again:\n");
}
printf("\n");
for(i=0;i<N;i++)
printf("%d",a[i]);
printf("\n");
while(flag)
{printf("input number to look for:");
scanf("%d",&number);
sign=0;
top=0;
bott=N-1;
if((number<a[0]) || (number>a[N-1]))
loca=-1;
while((!sign) && (top<=bott))
{mid=(bott+top)/2;
if(number==a[mid])
{loca=mid;
printf("Has found %d,its position is %d\n",number,loca+1);
sign=1;
}
else if(number<a[mid])
bott=mid-1;
else
top=mid+1;
}
if(!sign || loca==-1)
printf("can not find %d.\n",number);
printf("continue or not(Y/N)?");
scanf(" %c",&c);
if(c=='N' || c=='n')
flag=0;
}
}
以后输入字符都要这样吗?