how to fprintf value if i got value in file?

[isaac86]

my problem is i have 1 coloum of data and i wan to print other data at d next row. how?

for example
data1 data2
happy 5463
sad 67233

i alrdy hv data1 in a .txt, so how i print d data2 inside it?

[Banfa]

You will need to rewite the entire file. The is no such thing as inserting data into a file, all you can do is read all the data following the point that you want to insert new data, the writie your new data and then re-write the old data after the new data.

In your case it would be easier to parse the current file into memory and then overwrite it with the data you require. Alternitively read the current file and write to a temporary file with the data you require. Once you have got to the end of the file close both files, delete the old file and rename the temporary file to the old files name.

[isaac86]

btm is my programme. how i fprintf both digit n data inside a .txt?

{FILE * pFile;
pFile = fopen ("words.txt","r");

while (feof(pFile) == 0){

fgets(data, 20, pFile);
if (data[0] == '#') continue;

wLength = strlen( data);
if(wLength >= 7 && wLength <=10){
for(i=0; i< wLength ;i++ )
{digitConverter(data[i]);
printf("%d",digit);
}printf("\t%s",data);
}}

fclose(pFile);
}