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>
char xx[50][80];
int maxline=0;
int ReadDat(void);
void WriteDat(void);
void SortCharA()
{
  int i,j,k,strl;
  char ch;
  for (i=0;i<maxline;i++)
  {
    strl=strlen(xx[i]);       /*求该行的字符个数*/
    for(j=0;j<strl-1;j++)     /*对字符按从小到大的顺序进行排序*/
      for(k=j+1;k<strl;k++)
        if (xx[i][j]>xx[i][k])
         { ch=xx[i][j]; xx[i][j]=xx[i][k]; xx[i][k]=ch; } 
  }
}
void main()
{
  clrscr();
  if(ReadDat()) 
  { printf("数据文件IN83.DAT不能打开!\n\007"); return; }
  SortCharA();
  WriteDat();
}
int ReadDat(void)
{
  FILE *fp;
  int i=0;
  char *p;
  if((fp=fopen("IN83.DAT","r"))==NULL)  
  return 1;
  while(fgets(xx[i],80,fp)!=NULL) 
  {
    p=strchr(xx[i],'\n');
    if (p) *p=0;
    i++;
  }
  maxline=i;
  fclose(fp);
  return 0;
}
void WriteDat()
{
  FILE *fp;
  int i;
  clrscr();
  fp=fopen("OUT83.DAT","w");
  for(i=0;i<maxline;i++) 
  { printf("%s\n",xx[i]); fprintf(fp,"%s\n",xx[i]); }
  fclose(fp);
}