#include<iostream>
#include<fstream>
#include<cstdlib>
using namespace std;
#define N 100
struct Car                                    //定义车辆信息结构体
{
    char num[10];
    int size;
    int rutime;
    int ru;
    int chutime;
    int chu;
    float cost;
    float km;
    char name;
}car[N];
    char num[10];
    int size;
    int rutime;
    int ru;
    int chutime;
    int chu;
    float cost;
    float km;
    char name;
void Input()
{
    int i=0;
    int M;
    cout<<"请输入要录入的数据条数（小于等于100），按回车结束"<<endl;
    cin>>M;
    fstream file1;                                                                        //打开文件
    file1.open("data",ios::out);
        file1<<"num"<<' '<<"size"<<' '<<"rutime"<<' '<<"ru"<<' '<<"chutime"                         //文件中写入列标
             <<' '<<"chu"<<' '<<"cost"<<' '<<"km"<<' '<<"name"<<endl;
    cout<<"请按顺序输入num,size,rutime,ru,chutime,chu,cost,km,name"<<endl;
    for(i;i<N;i++)                                                                         //循环向文件中输入具体数据
    {
        cin>>num>>size>>rutime>>ru>>chutime>>chu>>cost>>km>>name;
        car[i].num=num;
        car[i].size=size;
        car[i].rutime=rutime;
        car[i].ru=ru;
        car[i].chutime=chutime;
        car[i].chu=chu;
        car[i].cost=cost;
        car[i].km=km;
        car[i].name=name;
        file1<<car[i].num<<' '<<car[i].size<<' '<<car[i].rutime<<' '<<car[i].ru<<' '<<car[i].chutime                     
             <<' '<<car[i].chu<<' '<<car[i].cost<<' '<<car[i].km<<' '<<car[i].name<<endl;
    }
   
}



注释
不好意思，第一次发帖，新人一个，可能格式什么不对~~不好意思

额，错的那行就是黑框那里

我把它最后改成循环对数组赋值，然后就对了，只是觉得这样子程序好麻烦