二次成像法：

double L,n,sum=0,e,s,k,z,c;cout << "輸入物與像之間距離L" << endl;cin >> L;cout << "輸入測量的數據個數n" << endl;cin >> n;cout << "輸入放大實像數據,回車相隔" << endl;double l1[500];for (int i = 0; i < n; i++){cin >> l1[i];}cout << "輸入縮小的實像數據，回車相隔";double l2[500];for (int i = 0; i < n; i++){cin >> l2[i];}

本代碼用于數據的輸入。

for (int i = 0; i < n; i++){sum += ((L * L) - ((l1[i] - l2[i]) * (l1[i] - l2[i]))) / (4 * L);e = sum / n;}for (int i = 0; i < n; i++){s = ((((L * L) - ((l1[i] - l2[i]) * (l1[i] - l2[i]))) / (4 * L)) - e) *((((L * L) - ((l1[i] - l2[i]) * (l1[i] - l2[i]))) / (4 * L)) - e);}k = s / (n - 1);z = sqrt(k);if (n == 2) {c = z * 8.98;}else if (n == 3) {c = z * 2.48;}else if (n == 4) {c = z * 1.59;}else if (n == 5) {c = z * 1.24;}else if (n == 6) {c = z * 1.05;}else if (n == 7) {c = z * 0.93;}else if (n == 8) {c = z * 0.84;}else if (n == 9) {c = z * 0.77;}else if (n == 10) {c = z * 0.72;}

本代碼用于數據計算

cout << "焦距為" << e << endl;cout << "A不確定度為" << c << endl;cout << "如果需要計算總不確定度，請輸入儀器偏差" << endl;double l, j;cin >> l;j = sqrt(c * c + l * l);cout << "總不確定度為" << j << endl;

本代碼用于結果輸出

完整代碼如下

#include <iostream> using namespace std; int main() {double L,n,sum=0,e,s,k,z,c;cout << "輸入物與像之間距離L" << endl;cin >> L;cout << "輸入測量的數據個數n" << endl;cin >> n;cout << "輸入放大實像數據,回車相隔" << endl;double l1[500];for (int i = 0; i < n; i++){cin >> l1[i];}cout << "輸入縮小的實像數據，回車相隔";double l2[500];for (int i = 0; i < n; i++){cin >> l2[i];}for (int i = 0; i < n; i++){sum += ((L * L) - ((l1[i] - l2[i]) * (l1[i] - l2[i]))) / (4 * L);e = sum / n;}for (int i = 0; i < n; i++){s = ((((L * L) - ((l1[i] - l2[i]) * (l1[i] - l2[i]))) / (4 * L)) - e) *((((L * L) - ((l1[i] - l2[i]) * (l1[i] - l2[i]))) / (4 * L)) - e);}k = s / (n - 1);z = sqrt(k);if (n == 2) {c = z * 8.98;}else if (n == 3) {c = z * 2.48;}else if (n == 4) {c = z * 1.59;}else if (n == 5) {c = z * 1.24;}else if (n == 6) {c = z * 1.05;}else if (n == 7) {c = z * 0.93;}else if (n == 8) {c = z * 0.84;}else if (n == 9) {c = z * 0.77;}else if (n == 10) {c = z * 0.72;}cout << "焦距為" << e << endl;cout << "A不確定度為" << c << endl;cout << "如果需要計算總不確定度，請輸入儀器偏差" << endl;double l, j;cin >> l;j = sqrt(c * c + l * l);cout << "總不確定度為" << j << endl; }

運行結果：

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總結

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