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 ConvertCharA(void)
{
  int  i,j,str;
  for(i=0;i<maxline;i++)
  {
    str =strlen(xx[i]);    
    for(j=0;j<str;j++)
      if(xx[i][j]=='z')
        xx[i][j]='a';     
      else if(xx[i][j]>='a' && xx[i][j]<='y') 
        xx[i][j]+=1;      
  }
}
main()
{
  clrscr() ;
  if(ReadDat())
  { printf("数据文件IN80.DAT不能打开!\n\007") ;  return ; }
  ConvertCharA() ;
  WriteDat() ;
}
int ReadDat(void)
{
  FILE *fp ;
  int i =0 ;
  char *p ;
  if((fp = fopen("IN80.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(void)
{
  FILE *fp ;
  int i ;
  clrscr() ;
  fp = fopen("OUT80.DAT", "w") ;
  for(i = 0 ; i < maxline ; i++)
  { printf("%s\n", xx[i]); fprintf(fp, "%s\n", xx[i]); }
  fclose(fp) ;
}