功能: 服务端生成完整报告并保护单任务

- 使用 libxlsxwriter 常量内存导出 Excel\n- 增加全局任务占用提示与原始数据持久化\n- 保留运行时任务数据并更新接口文档

third_party/libxlsxwriter_repo/examples/tutorial1.c

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+/*
+ * A simple program to write some data to an Excel file using the
+ * libxlsxwriter library.
+ *
+ * This program is shown, with explanations, in Tutorial 1 of the
+ * libxlsxwriter documentation.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include "xlsxwriter.h"
+
+/* Some data we want to write to the worksheet. */
+struct expense {
+    char item[32];
+    int  cost;
+};
+
+struct expense expenses[] = {
+    {"Rent", 1000},
+    {"Gas",   100},
+    {"Food",  300},
+    {"Gym",    50},
+};
+
+
+int main() {
+
+    /* Create a workbook and add a worksheet. */
+    lxw_workbook  *workbook  = workbook_new("tutorial01.xlsx");
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+
+    /* Start from the first cell. Rows and columns are zero indexed. */
+    int row = 0;
+    int col = 0;
+
+    /* Iterate over the data and write it out element by element. */
+    for (row = 0; row < 4; row++) {
+        worksheet_write_string(worksheet, row, col,     expenses[row].item, NULL);
+        worksheet_write_number(worksheet, row, col + 1, expenses[row].cost, NULL);
+    }
+
+    /* Write a total using a formula. */
+    worksheet_write_string (worksheet, row, col,     "Total",       NULL);
+    worksheet_write_formula(worksheet, row, col + 1, "=SUM(B1:B4)", NULL);
+
+    /* Save the workbook and free any allocated memory. */
+    return workbook_close(workbook);
+}