我几乎不好意思问这个问题,但无论出于何种原因我都无法让这个问题起作用。它是可汗学院关于二元搜索的练习。 https://www.khanacademy.org/computing/computer-science/algorithms/binary-search/p/challenge-binary-search
任何帮助将不胜感激!谢谢!
编辑:我应该编辑一下,说我从Khan Academy获得的错误消息是"看起来你在while循环中几乎有正确的条件,但是它仍然有问题"它没有太大的帮助。
/* Returns either the index of the location in the array,
or -1 if the array did not contain the targetValue */
var doSearch = function(array, targetValue) {
var min = 0;
var max = array.length - 1;
var guess;
while(max > min) {
guess = Math.floor((max+min)/2);
if(array[guess] === targetValue) {
return guess;
} else if (array[guess] < targetValue) {
min = guess + 1;
} else {
max = guess - 1;
}
}
return -1;
};
var primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37,
41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97];
var result = doSearch(primes, 73);
println("Found prime at index " + result);
Program.assertEqual(doSearch(primes, 73), 20);
&#13;
答案 0 :(得分:4)
改变这个:
while(max > min)
到
while(max >= min)