在C++中读取文件时字符串的指针数组

#include <iostream>
#include <cstdio>

int main() {
    // 打开文件
    FILE* file = fopen("filename.txt", "r");

    if (file == nullptr) {
        std::cout << "无法打开文件" << std::endl;
        return 1;
    }

    // 读取文件内容
    const int MAX_LINES = 100;
    const int MAX_LENGTH = 256;
    char* lines[MAX_LINES];

    for (int i = 0; i < MAX_LINES; i++) {
        char* line = new char[MAX_LENGTH];

        if (fgets(line, MAX_LENGTH, file) != nullptr) {
            lines[i] = line;
        } else {
            // 读取到文件末尾或出错，结束循环
            delete[] line;
            lines[i] = nullptr;
            break;
        }
    }

    // 关闭文件
    fclose(file);

    // 输出文件内容
    for (int i = 0; lines[i] != nullptr; i++) {
        std::cout << lines[i];
        delete[] lines[i];
    }

    return 0;
}