輸出txt轉輸出excel

因為比起txt文字檔excel表格更容易看,我嘗試換成excel

#ifndef HIREPERSON_H_INCLUDED
#define HIREPERSON_H_INCLUDED
#include <stdio.h>
#include <string.h>
#include "functions.h"

void hirePerson(Member members[]) {
    int id;
    char name[80];
    printf("Enter the number of the person you want to hire: ");
    scanf("%d", &id);
    getchar();
    printf("Enter the name of the person you want to hire: ");
    fgets(name, sizeof(name), stdin);
    name[strcspn(name, "\n")] = 0;

    for (int i = 0; i < MAX_MEMBERS; i++) {
        if (members[i].id == id) {
            members[i].hired = 1;
            strcpy(members[i].name, name);
            break;
        }
    }
    FILE *fp;
    if ((fp = fopen ("hirelist.xls", "w")) == NULL) {
        printf("Open File ERROR!\n");
    }
    else{
        fprintf(fp, "編號\t是否已招募\t姓名\n");
        for (int i = 0; i < MAX_MEMBERS; i++) {
                fprintf(fp, "%d\t%d\t%s\n", members[i].id, members[i].hired, members[i].name);
        }

        fclose(fp);
    }
}

#endif 

失敗過程

新版(xlsx)檔案無法使用

#ifndef HIREPERSON_H_INCLUDED
#define HIREPERSON_H_INCLUDED
#include <stdio.h>
#include <string.h>
#include "functions.h"

void hirePerson(Member members[]) {
    int id;
    char name[80];
    printf("Enter the number of the person you want to hire: ");
    scanf("%d", &id);
    getchar();
    printf("Enter the name of the person you want to hire: ");
    fgets(name, sizeof(name), stdin);
    name[strcspn(name, "\n")] = 0;

    for (int i = 0; i < MAX_MEMBERS; i++) {
        if (members[i].id == id) {
            members[i].hired = 1;
            strcpy(members[i].name, name);
            break;
        }
    }
    FILE *fp;
    if ((fp = fopen ("hirelist.xlsx", "w")) == NULL) {
        printf("Open File ERROR!\n");
    }
    else{
        fprintf(fp, "編號\t是否已招募\t姓名\n");
        for (int i = 0; i < MAX_MEMBERS; i++) {
                fprintf(fp, "%d\t%d\t%s\n", members[i].id, members[i].hired, members[i].name);
        }

        fclose(fp);
    }
}

#endif 

所以換成舊版(xls)

問題

會報錯但可以正常使用