54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
// 浮点数误差比较验证程序
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// 编译: g++ -o float_validator float_validator.cpp
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// 使用: ./float_validator input.txt expected.txt result.txt
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#include <iostream>
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#include <fstream>
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#include <cmath>
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#include <iomanip>
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using namespace std;
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const double EPS = 1e-9;
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int main(int argc, char* argv[]) {
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if (argc != 4) {
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cout << "WA" << endl;
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return 0;
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}
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ifstream expected(argv[2]); // 标准答案
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ifstream result(argv[3]); // 用户输出
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if (!expected.is_open() || !result.is_open()) {
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cout << "WA" << endl;
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return 0;
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}
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double exp_val, res_val;
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// 读取期望的浮点数
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if (!(expected >> exp_val)) {
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cout << "WA" << endl;
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return 0;
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}
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// 读取用户输出的浮点数
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if (!(result >> res_val)) {
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cout << "WA" << endl;
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return 0;
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}
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// 比较数值，允许相对误差和绝对误差
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double diff = fabs(exp_val - res_val);
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double rel_error = (fabs(exp_val) > EPS) ? diff / fabs(exp_val) : diff;
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if (diff <= 1e-6 || rel_error <= 1e-6) { // 放宽误差范围
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cout << "AC" << endl;
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} else {
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cout << "WA" << endl;
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}
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expected.close();
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result.close();
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return 0;
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} |