急!!高分请教!!

Question

我现在要对一文本内容进行修改,文本内容:
HI x=3.1 y=4;
Nihao
HI x=4.2 y=5;
HI x=5 y=6;这时候我要读进一个数j(如j=0.1),要求我此时输出变为:HI x=3.2 y=4;
Nihao
HI x=4.3 y=5;
HI x=5.1 y=6;即所有x=后的数字全部加0.1,该如何做?头疼好几天,望达人指教.

Answer 1

FILE *stream =NULL;
   int  y;
   float x;
   char ch;
   char s1[3];
   char s2[3];
   char s3[3];
   char s4[3];
   CString str = "";
   CString strTemp = "";
   stream = fopen( "fscanf.txt", "r+" );
   for(int i= 0;i<4;i++)
   {
      if(i!= 2)
      {
          fscanf( stream, "%s%2s", s1,s2);
  fscanf( stream, "%s",s3);
  x = atof(s3);
  x += 0.1;
  fscanf(stream,"%2s",s3);
  fscanf(stream,"%s",s4);
  y = atoi(s4);
  strTemp.Format("%s %s%1.1f %s%d\n",s1,s2,x,s3,y);
          str+=strTemp;
      }
      else
      {
          strTemp = "Nihao\n";
          str += strTemp;
       }
   }
   fseek(stream,0L,SEEK_SET);
   fprintf(stream,str);
}

Answer 2

对了， 把 
stream = fopen( "fscanf.txt", "r+" );
改为 
stream = fopen( "fscanf.txt", "w+" );

Answer 3

http://community.csdn.net/Expert/TopicView.asp?id=3990536
是不是作业哦~~

Answer 4

int  y;
float x;
char s[MAX_LENGTH];
FILE *fin = fopen( "fscanf.txt", "r" );
FILE *fout = fopen( "fprintf.txt", "w" );
while(!feof(fin))
{
if(2==fscanf( fin, "HI x=%f y=%d;\n", &x,&y))
{
fprintf(fout, "HI x=%.1f y=%d;\n",x+0.1,y);
}
else 
{
fscanf(fin,"%s\n",s);
fprintf(fout, "%s\n",s);
}
}
fclose(fin);
fclose(fout);