c语言:
/*
二分法查找
*/
#define N 6
main()
{
int a[N]={1,2,3,5,7,10};
int searchNum=5;
int index;
index=search(a,searchNum);
if(index!=-1)
printf("a[%d]=%d",index,searchNum);
else
printf("not found!");
getch();
}
int search(int a[],int num)
{
int begin,middle,end;
begin=0;
end=N-1;
middle=(begin+end)/2;
while(a[middle]!=num && !(middle==begin&&middle==end))
{
if(a[middle]<num)
begin=middle+1;
else
end=middle;
middle=(begin+end)/2;
}
if(a[middle]==num)
return middle;
else
return -1;
}
二分法查找
*/
#define N 6
main()
{
int a[N]={1,2,3,5,7,10};
int searchNum=5;
int index;
index=search(a,searchNum);
if(index!=-1)
printf("a[%d]=%d",index,searchNum);
else
printf("not found!");
getch();
}
int search(int a[],int num)
{
int begin,middle,end;
begin=0;
end=N-1;
middle=(begin+end)/2;
while(a[middle]!=num && !(middle==begin&&middle==end))
{
if(a[middle]<num)
begin=middle+1;
else
end=middle;
middle=(begin+end)/2;
}
if(a[middle]==num)
return middle;
else
return -1;
}
c#:
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asp:
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