1_pro.c

C源代码 计算机等级考试C语言上机题

#include  <stdio.h>
#include  <string.h>
#include  <conio.h>
#include  <stdlib.h>
#define  MAX  100
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<99; i++ )
    for( j=i+1; j<100; j++ )
    {
      if(strcmp(sell[i].dm,sell[j].dm)<0)           /*按产品代码从大到小进行排列*/
      { xy=sell[i]; sell[i]=sell[j]; sell[j]=xy; }
      else if(strcmp(sell[i].dm,sell[j].dm)==0)    /*若产品代码相同*/
      if(sell[i].je<sell[j].je)                       /*则按金额从大到小进行排列*/
      { xy=sell[i]; sell[i]=sell[j]; sell[j]=xy; }
    }
}
void main()
{
  memset(sell,0,sizeof(sell));
  ReadDat();
  SortDat();
  WriteDat();
}
void ReadDat()
{
  FILE *fp;
  char str[80],ch[11];
  int i;
  fp=fopen("IN3.DAT","r");
  for(i=0;i<100;i++)
  {
    fgets(str,80,fp);
    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;
  }
  fclose(fp);
}
void WriteDat(void)
{
  FILE *fp;
  int i;
  fp=fopen("OUT3.DAT","w");
  for(i=0;i<100;i++)
     fprintf(fp,"%s %s %4d %5d %10ld\n",sell[i].dm,sell[i].mc,sell[i].dj,sell[i].sl,
sell[i].je);
  fclose(fp);
}