/* sheji.c：按員工工資合計(jì)循序排序*/
#include "stdio.h"
void SortByheji()
 {
    int i,j,k;
    yuangong TmpS;   /*定義進(jìn)行操作時(shí)的臨時(shí)結(jié)構(gòu)體變量*/
    yuangong s[SIZE];/*SIZE，在common.h頭文件中定義的常量，值為100  */
    int recNumber = 0;
    char DataFile[40] = ""; /*DataFile存儲(chǔ)員工工資信息的文件名*/
    FILE *fp;/*====fp指針指向存儲(chǔ)數(shù)據(jù)的文件名====*/
    /*提示用戶輸入要進(jìn)行排序的文件名*/
    printf("\nplease input the name of file where data is stored,end with enter key.\n");
    gets(DataFile);
    /*提示用戶輸入要進(jìn)行排序的文件名*/
    while(*DataFile == ('\0'))
    {
        printf("\nplease input the name of file where data is stored,end with enter key.\n");
        gets(DataFile);
    }
    /*以讀的方式打開文件，如文件不存在，提示錯(cuò)誤*/
    fp=fopen(DataFile,"rb");
    if (fp == NULL)
    {
        printf("\nOpen file %s fail!End with any key\n",DataFile);
        perror("Open file fail");
        getch();
        exit(1);
    }
   /*將文件中要排序的信息存入結(jié)構(gòu)體數(shù)組*/
    while((fread(&TmpS,sizeof(yuangong),1,fp)) != (int)NULL)
    {
        s[recNumber].Number = TmpS.Number;
        strcpy(s[recNumber].Name, TmpS.Name);
        s[recNumber].gongzi = TmpS.gongzi;
        s[recNumber].jiangjin = TmpS.jiangjin;
        s[recNumber].baoxian = TmpS.baoxian;
        s[recNumber].shuijin=TmpS.shuijin;
        s[recNumber].heji=TmpS.heji;
        recNumber++;
    }
    fclose(fp);
 /*====如果文件中有記錄，則將各條記錄按合計(jì)值排序===*/
    if(recNumber>1)
    {
        /*====用選擇排序法進(jìn)行按合計(jì)的排序====*/
        for(i=0;i<recNumber-1;i++)
        {
            k = i;
            for(j=i+1;j<recNumber;j++)
            {
                if(s[k].heji<s[j].heji) k = j;
            }
            TmpS.Number = s[k].Number;
            strcpy(TmpS.Name,s[k].Name);
            TmpS.gongzi = s[k].gongzi;
            TmpS.jiangjin = s[k].jiangjin;
            TmpS.baoxian = s[k].baoxian;
            TmpS.shuijin = s[k].shuijin;
            TmpS.heji = s[k].heji;


            s[k].Number = s[i].Number;
            strcpy(s[k].Name,s[i].Name);
            s[k].gongzi = s[i].gongzi;
            s[k].jiangjin = s[i].jiangjin;
            s[k].baoxian = s[i].baoxian;
            s[k].shuijin = s[i].shuijin;
            s[k].heji = s[i].heji;

            s[i].Number = TmpS.Number;
            strcpy(s[i].Name,TmpS.Name);
            s[i].gongzi = TmpS.gongzi;
            s[i].jiangjin = TmpS.jiangjin;
            s[i].baoxian = TmpS.baoxian;
            s[i].shuijin = TmpS.shuijin;
            s[i].heji = TmpS.heji;
        }

        /*====將排序好的結(jié)構(gòu)體記錄寫入文件====*/
        fp=fopen(DataFile,"wb+");
        if (fp == NULL)
        {
            printf("\nSet up file %sfail !end with anykey.\n",DataFile);
            perror("Set up fail");
            getch();
            exit(1);
        }
        for(i=0; i<recNumber; i++)
        {
            if(fwrite(&s[i],sizeof(yuangong),1,fp)!=1)
            {
                printf("\nWrite file %s fail!end with anykey.\n",DataFile);
                perror("Write file fail!");
                    getch();
                    exit(1);
            }
        }
        fclose(fp);
    }
     /*====顯示排序后的文件====*/
    printf("the Employee's Salary in file %s is as flow:.\n",DataFile);

    fp=fopen(DataFile,"rb");
    if (fp == NULL)
    {
        printf("\nOpen file%sfail!End with any key \n",DataFile);
        perror("Open file fail");
        getch();
        exit(1);
    }

    printf("\nNumber \tName\tgongzi\tjiangjin\tbaoxian\tshuijin\theji\n");
    while(fread(&TmpS,sizeof(yuangong),1,fp) != (int)NULL)
    {
        printf("\n%ld     \t%s\t%4.2f\t%4.2f   \t%4.2f \t%4.2f \t%4.2f\n",TmpS.Number,TmpS.Name,TmpS.gongzi,TmpS.jiangjin,TmpS.baoxian,TmpS.shuijin,TmpS.heji);
    }
    fclose(fp);
}