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我正在可汗学院学习编码。它使用处理作为其基本语言。我了解到 Java 没有 goto 功能。那么如何使用处理实现goto功能。带有片段的解释表示赞赏。

这是我的代码,我评论了我想使用 goto 功能的地方:

/* 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;

    //startover:

    if (guess === max || guess === min) {
      //goto notFound;
    }

    guess = round((min + max) / 2);

    if (targetValue === array[guess]) {
      return guess;
    } else {
      if (targetValue > array[guess]) {
        min = guess + 1;
        //goto startover;
      } else {
        max = guess - 1;
        //goto startover;
      }
    }
  }
  //notFound:
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);

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1 回答 1

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您可能做的最好的事情是使用 for 循环并使用breakor continuefor gotos。

for(var unusedVariable = 0;1==1;unusedVariable++){//equivalent of "startover:"
    if(condition1){
        continue;//goto startover;
    }
    if(condition2){
        continue;//goto startover;
    }
    if(condition1){
        break;//goto notFound;
    }
}//notFound:
于 2016-03-14T01:50:37.987 回答