C语言使用二分法查找指定数据（二分法）

#include 
int main()
{
	int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, n;
    int left = 0, right = n = 11;
    int i = n / 2;
    int b , t = 0;
    scanf("%d", &b);
    while (left <= right)
    {
        if (b < a[i])
            right = i - 1;
        if (b > a[i])
            left = i + 1;
        if (b == a[i])
        {
            t = 1;
            break;
        }
        i = (left + right) / 2;
    }
    if (t == 1)
        printf("%d=a[%d]", b, i);
    else
        printf("no");
    return 0;
}