编号 - yamaumima/hello.github.io GitHub Wiki

#include <iostream>
#include <fstream>
#include <string>

int main() {
    std::ifstream inputFile("E:\\param.txt");
    std::ofstream outputFile("E:\\param_test.txt");

    if (!inputFile.is_open()) {
        std::cerr << "Failed to open input file!" << std::endl;
        return 1;
    }

    if (!outputFile.is_open()) {
        std::cerr << "Failed to open output file!" << std::endl;
        return 1;
    }

    std::string line;
    int lineNumber = 1;

    while (std::getline(inputFile, line)) {
        if (!line.empty()) {
            outputFile << lineNumber << " " << line << std::endl;
            ++lineNumber;
        }
    }

    inputFile.close();
    outputFile.close();

    return 0;
}