ch26-10.c

C语言程序设计上机指导与练习 冶金工业出版社 刘怀亮

#include <stdio.h>
#include <mem.h>
#include <string.h>
#include <conio.h>
#include <stdlib.h>
#define MAX 10
typedef struct
{
   char dm[5];  /*产品代码*/
   char mc[11]; /*产品名称*/
   int dj;      /*单价*/
   int sl;      /*数量*/
   long je;     /*金额*/
}PRO;
PRO sell[MAX];
void ReadDat();
void WriteDat();
void SortDat()
{  int i,j;
   PRO xy;
   for(i=0;i<9;i++)
      for(j=i+1;j<10;j++)
         if(strcmp(sell[i].dm,sell[j].dm)<0||strcmp(sell[i].dm,sell[j].dm)
              ==0&&sell[i].je<sell[j].je)
         {xy=sell[i]; sell [i]=sell[j]; sell[j]=xy;}
}
void main()
{
   Memcpy(sell,0,sizeof(sell));
   ReadDat();
   SortDat();
   WriteDat();
}
void ReadDat()
{
   char str[80],ch[11];
   int i;
   printf("\nPlease input the record:\n");
   for(i=0;i<10;i++)
   {
      scanf("%s",str);
      memcpy(sell[i].dm,str,4);
      memcpy(sell[i].mc,str+4,10);
      memcpy(ch,str+14,4);ch[4]=0;
      sell[i].dj=atoi(ch);
      memcpy(ch,str+18,5);ch[5]=0;
      sell[i].sl=atoi(ch);
      sell[i].je=(long)sell[i].dj*sell[i].sl;
   }
}
void WriteDat(void)
{
   FILE *fp;
   int i;
  
   fp=fopen("OUT.DAT","w");
   for(i=0;i<100;i++)
   {
      printf("%s %s %4d %5d %5d\n", sell[i].dm,sell[i].mc, sell[i].dj,sell[i].sl,
         sell[i].je);
      fprintf(fp,"%s %s %4d %5d %5d\n", sell[i].dm,sell[i].mc,sell[i].dj,sell[i].sl,
         sell[i].je);
   }
   fclose(fp);
}