在 Q Sharp (Q#) (Quantum Development Kit)

问题描述

所以，基本上，我在 Microsoft Azure 网站上做了创建随机数的教程，现在我正在尝试添加一些功能，包括他们的建议添加最小数字。

仅生成一个数字 max 的初始代码是：

   operation SampleRandomNumberInRange(max : Int) : Int {
        // mutable means variables that can change during computation
        mutable output = 0;
        // repeat loop to generate random numbers until it generates one that is less or equal to max
        repeat {
            mutable bits = new Result[0];
            for idxBit in 1..BitSizeI(max) {
                set bits += [GeneraterandomBit()];
            }
            // ResultArrayAsInt is from Microsoft.Quantum.Convert library,converts string to positive integer
            set output = ResultArrayAsInt(bits);
        } until (output <= max);
        return output;
    }

    @EntryPoint()
    operation SampleRandomNumber() : Int {
        // let declares var which don't change during computation
        let max = 50;
        Message($"Sampling a random number between 0 and {max}: ");
        return SampleRandomNumberInRange(max);
    }

一切正常。现在，我想生成两个数字，所以我想创建一个函数 TwoSampleRandomNumbersInRange，但我不知道如何使该函数返回诸如“Int，Int”之类的结果，我尝试了一些方法，包括以下内容：

    operation TwoSampleRandomNumbersInRange(min: Int,max : Int) : Int {
        // mutable means variables that can change during computation
        mutable output = 0;
        // repeat loop to generate random numbers until it generates one that is less or equal to max
        repeat {
            mutable bits = new Result[0];
             
            for idxBit in 1..BitSizeI(max) {
                set bits += [GeneraterandomBit()];
            }

            for idxBit in 1..BitSizeI(min) {
                set bits += [GeneraterandomBit()];
            }
            // ResultArrayAsInt is from Microsoft.Quantum.Convert library,converts string to positive integer
            set output = ResultArrayAsInt(bits);
        } until (output >= min and output <= max);
        return output;
    }

为了生成两个数字，我试过这个：

operation TwoSampleRandomNumbersInRange(min: Int,max : Int) : Int,Int {
//code here
}

...但输出的语法不正确。

我还需要输出：

set output = ResultArrayAsInt(bits);

有两个数字，但 ResultArrayAsInt，顾名思义，只返回一个 Int。我需要返回两个整数。

感谢任何帮助，谢谢！

解决方法

操作的返回必须是一种数据类型，在这种情况下，要表示一对整数，您需要一个整数元组：(Int,Int)。

所以你的操作和返回语句的签名是

operation TwoSampleRandomNumbersInRange(min: Int,max : Int) : (Int,Int) {
    // code here
    return (integer1,integer2);
}

,

我找到了自己问题的答案，我所要做的就是：

    operation SampleRandomNumberInRange(min: Int,max : Int) : Int {
        // mutable means variables that can change during computation
        mutable output = 0;
        // repeat loop to generate random numbers until it generates one that is less or equal to max
        repeat {
            mutable bits = new Result[0];
            for idxBit in 1..BitSizeI(max) {
                set bits += [GenerateRandomBit()];
            }
            // ResultArrayAsInt is from Microsoft.Quantum.Convert library,converts string to positive integer
            set output = ResultArrayAsInt(bits);
        } until (output >= min and output <= max);
        return output;
    }

    @EntryPoint()
    operation SampleRandomNumber() : Int {
        // let declares var which don't change during computation
        let max = 50;
        let min = 10;
        Message($"Sampling a random number between {min} and {max}: ");
        return SampleRandomNumberInRange(min,max);
    }

    
}