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  • 同济大学物理实验 数据处理

    #include<iostream>
    #include<cmath>
    #include<iomanip>
    #include<cstdlib>
    using namespace std;
    int main()
    {
        double Ua, Ub,Ux,Urx;
        double Ub_equp;
        int i;
        const int N = 10;
        double temp = 0;
        const double square_root_3 = sqrt(3);
        double average;
        double f, Urf, Uf,v,Urv,Uv;
        double value[N] = { 9.86,9.86,9.85,9.91,9.84,9.82,9.88,9.87,9.83,9.84 };
            /* proto[2 * N] = {
            61.36,66.84,70.54,75.80,80.50,85.80,90.60,95.10,100.08,105.30,
            110.30,114.90,119.66,124.46,130.40,135.00,139.50,145.00,149.60,154.90 };*/
        cout << "请输入" << N << "个数据:(注意化成相同单位" << endl;
    /*    for (i = 0;i < 2 * N;i++)
        {
            cout << "请输入第" << i + 1 << "个数据:    ";
            cin >> proto[i];
        }*/
        for (i = 0;i < N;i++)
        {
            /*value[i] = (proto[i + 10] - proto[i]) / 5;
            cout << "第" << i + 1 << "个逐差数据为:     " << value[i] << endl;*/
            temp += value[i];
        }
        average = temp / N;
        cout << "平均值为:   " << setprecision(5) << average << endl;
        cout << "仪器不确定度:    ";
        cin >> Ub_equp;
        Ub = Ub_equp / square_root_3;
        temp = 0;
        for (i = 0;i < N;i++)
            temp += ((value[i] - average)*(value[i] - average));
        Ua = sqrt(temp / (N*(N - 1)));
        cout << "数值不确定度 Ua:     " << setprecision(5) << Ua << endl;
        cout << "仪器不确定度Ub:     " << setprecision(5) << Ub << endl;
        Ux = sqrt(Ua*Ua + Ub*Ub);
        cout << "合成不确定度:      " << setprecision(5) << Ux << endl;
        Urx = Ux / average;
        cout << "合成数值不确定度:       " << setprecision(5) << Urx << endl;
        Uf = 0.01 / square_root_3;
        cout << "频率的仪器不确定度:     " << setprecision(5) <<Uf<< endl;
        cout << "频率:      ";
        cin >> f;
        Urf = Uf / f;
        cout << "频率的不确定度:" << setprecision(5) << Urf << endl;
        v = average*f;
        cout << "声速:     " << v << endl;
        Urv = sqrt(Urx*Urx + Urf*Urf);
        cout << "声速不确定度:" << Urv << endl;
        Uv = Urv*v;
        cout << "声速不确定度数值:" << Uv << endl;
        cout << "百分误差:    " << fabs(v - 341.70) / 341.70 * 100 << endl;
        system("pause");
    }
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  • 原文地址:https://www.cnblogs.com/liutianchen/p/5474487.html
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