Reading first column in a file and creating new files… - MYCPLUS

This topic has 1 reply, 2 voices, and was last updated 15 years, 3 months ago by GWILouisaxwzkla.

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August 10, 2009 at 11:42 am #2220
GarnetHuynh
Participant
Hi,
Could you please assist me with the ‘C’ code for the following :-
I have a file called Test.txt.
I) Test.txt

A,BC,DE,HI,00,11
A,DE,HI,JK,23,24
A,XX,YY,YU,40,95
B,CD,EF,GH,11,22
B,JJ,KK,JU,45,89
C,DE,FG,HI,22,33
C,EF,GH,IJ,77,88
D,EF,GH,IJ,33,44
D,FG,HI,JK,44,55
Need to read the first column of the file and create files such that for each change in the first column, a new file is created with the filename as first column.ref.
That is for above file, 4 Files are created as each time the first column changes, a new file is created. The 4 files generated are as follows:-
II)
1) A.ref

BC,DE,HI,00,11
DE,HI,JK,23,24
XX,YY,YU,40,95
2) B.ref

CD,EF,GH,11,22
JJ,KK,JU,45,89
3) C.ref

DE,FG,HI,22,33
EF,GH,IJ,77,88
4) D.ref

EF,GH,IJ,33,44
FG,HI,JK,44,55
Best Regards,
Marconi.

August 11, 2009 at 6:00 pm #3601

GWILouisaxwzkla

Participant

This seems to work:

<br />
/****************************************************************<br />
* File Name : c:programstempCG.cpp<br />
* Date : August,10,2009<br />
* Comments : new project<br />
* Compiler/Assembler : Visual C++ 6.0<br />
* Modifications :<br />
*<br />
*<br />
*<br />
*<br />
*<br />
* Program Shell Generated At: 3:17:50 p.m.<br />
=-=-=-=-=-=-=-=--=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/<br />
<br />
<br />
#include <br />
#include <br />
//#include <br />
//#include <br />
//#include <br />
//#include <br />
<br />
using namespace std;<br />
<br />
//main function ******************************<br />
<br />
int main ( )<br />
{<br />
<br />
//CHANGE FILE NAMES TO WHAT YOU WANT HERE !!!!!!!!!!!!!!!!!!!!!<br />
<br />
FILE * inputFile  = fopen ( "c:\programs\data.txt", "r+" );<br />
<br />
FILE * outputFile1 = fopen ( "c:\programs\data2.txt", "w+" );<br />
FILE * outputFile2 = fopen ( "c:\programs\data3.txt", "w+" );<br />
FILE * outputFile3 = fopen ( "c:\programs\data4.txt", "w+" );<br />
FILE * outputFile4 = fopen ( "c:\programs\data5.txt", "w+" );<br />
<br />
//@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@<br />
<br />
char ch;<br />
char newline = 10;<br />
<br />
ch = fgetc ( inputFile );<br />
fgetc ( inputFile );<br />
while ( ! feof ( inputFile )  )<br />
{<br />
<br />
if ( ch == 'A' )<br />
{<br />
ch = fgetc ( inputFile );<br />
while ( ch != newline )<br />
{<br />
fputc ( ch , outputFile1 );<br />
ch = fgetc ( inputFile );<br />
}<br />
fputc ( 'n' , outputFile1);<br />
}<br />
if ( ch == 'B' )<br />
{<br />
ch = fgetc ( inputFile );<br />
while ( ch != newline )<br />
{<br />
fputc ( ch , outputFile2 );<br />
ch = fgetc ( inputFile );<br />
}<br />
fputc ( 'n' , outputFile2 );<br />
}<br />
if ( ch == 'C' )<br />
{<br />
ch = fgetc ( inputFile );<br />
while ( ch != newline )<br />
{<br />
fputc ( ch , outputFile3 );<br />
ch = fgetc ( inputFile );<br />
}<br />
fputc ( 'n' , outputFile3);<br />
}<br />
if ( ch == 'D' )<br />
{<br />
ch = fgetc ( inputFile );<br />
while ( ch != newline )<br />
{<br />
fputc ( ch , outputFile4 );<br />
ch = fgetc ( inputFile );<br />
}<br />
fputc ( 'n' , outputFile4);<br />
}<br />
<br />
ch = fgetc ( inputFile );<br />
fgetc ( inputFile );<br />
}<br />
fclose ( outputFile1 );<br />
fclose ( outputFile2 );<br />
fclose ( outputFile3 );<br />
fclose ( outputFile4 );<br />
<br />
return 0 ;<br />
}<br />
<br />
<br />
<br />
<br />

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/****************************************************************

* File Name : c:programstempCG.cpp

* Date : August,10,2009

* Comments : new project

* Compiler/Assembler : Visual C++ 6.0

* Modifications :

*

* Program Shell Generated At: 3:17:50 p.m.

=-=-=-=-=-=-=-=--=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/

#include

//#include

using namespace std;

//main function ******************************

int main ( )

{

//CHANGE FILE NAMES TO WHAT YOU WANT HERE !!!!!!!!!!!!!!!!!!!!!

FILE * inputFile = fopen ( "c:\programs\data.txt", "r+" );

FILE * outputFile1 = fopen ( "c:\programs\data2.txt", "w+" );

FILE * outputFile2 = fopen ( "c:\programs\data3.txt", "w+" );

FILE * outputFile3 = fopen ( "c:\programs\data4.txt", "w+" );

FILE * outputFile4 = fopen ( "c:\programs\data5.txt", "w+" );

//@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

char ch;

char newline = 10;

ch = fgetc ( inputFile );

fgetc ( inputFile );

while ( ! feof ( inputFile ) )

{

if ( ch == 'A' )

{

ch = fgetc ( inputFile );

while ( ch != newline )

{

fputc ( ch , outputFile1 );

ch = fgetc ( inputFile );

}

fputc ( 'n' , outputFile1);

}

if ( ch == 'B' )

{

ch = fgetc ( inputFile );

while ( ch != newline )

{

fputc ( ch , outputFile2 );

ch = fgetc ( inputFile );

}

fputc ( 'n' , outputFile2 );

}

if ( ch == 'C' )

{

ch = fgetc ( inputFile );

while ( ch != newline )

{

fputc ( ch , outputFile3 );

ch = fgetc ( inputFile );

}

fputc ( 'n' , outputFile3);

}

if ( ch == 'D' )

{

ch = fgetc ( inputFile );

while ( ch != newline )

{

fputc ( ch , outputFile4 );

ch = fgetc ( inputFile );

}

fputc ( 'n' , outputFile4);

}

ch = fgetc ( inputFile );

fgetc ( inputFile );

}

fclose ( outputFile1 );

fclose ( outputFile2 );

fclose ( outputFile3 );

fclose ( outputFile4 );

return 0 ;

}

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