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  <ctype.h>
unsigned char xx[50][80];
int maxline=0;/*文章的总行数*/
int ReadDat(void);
void WriteDat(void);
void encryptChar()
{ 
  int i;
  char *pf;
  for(i=0;i<maxline;i++)
  {
    pf=xx[i];              /*指针pf指向该行第一个字符*/
    while(*pf!=0)
    {
      if((*pf>='A'&&*pf<='Z')||*pf*11%256<=32)
        { pf++; continue; }
      *pf=*pf*11%256;    /*否则将所对应的字符进行替代*/
      pf++;                /*指向下一个字符*/
    }
  }
}
void main()
{
  
  if(ReadDat())
  { printf("数据文件ENG70.IN不能打开！\n\007"); return; }
  encryptChar();
  WriteDat();
}
int ReadDat(void)
{
  FILE *fp;
  int i=0;
  unsigned char *p;
  if((fp=fopen("ENG70.in","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(void)
{
  FILE *fp;
  int i;
  fp=fopen("PS70.DAT","w");
  for(i=0;i<maxline;i++)
  { printf("%s\n",xx[i]); fprintf(fp,"%s\n",xx[i]); }
  fclose(fp);
}