Extracting data out from txt file seperated by ";"

[tlvlx]

Hi ,

i am having this problem of extracting data out from txt file being seperated by ¨;¨.

Example:

How is your day?;Fine
Where are you now?;At your house

My code is as follow:

char *ques[20];
char *ans[20];

int i=0;
FILE *fp;
fp=fopen("qna.txt", "r");

if ( fp == 0 )
{
printf( "Could not open file\n" );
}
else
{
while(fgets(fileInput, sizeof fileInput, fp))   
{

if(sscanf(fileInput, "%s,%s", &ques[i], &ans[i]) == 2)

{

i++;
}

}
}
fclose( fp );

The difficulties i faced was that i am not able to successfully extract the data out from the text file and stored it into both que[] and ans[].

Errors keep coming out from the "%s,%s". And i guess i might have key in the wrong placeholders..

Anyone can help ? Thanks in advance...

[laserlight]

ques and ans are arrays of 20 pointers to char. You apparently have not actually allocated any space to store the strings that you want to read in. If you know that there is a maximum of 20 lines in the file, and that each string to be stored has a certain maximum length (that is not too large), then it may be simpler to just create an array of 20 arrays of char, thus there would be space to store the strings.

Considering what you have now, and assuming that you did allocate space for the string, the problem that you are currently facing is that ques[i] is a pointer to char, so &ques[i] is a pointer to pointer to char, but %s expects a corresponding pointer to char. As such, changing &ques[i] to ques[i] would fix that problem. But there is more: %s reads until the first whitespace character. You could specify more precisely, e.g., %[^ ]s (I think), or perhaps use strtok() instead of sscanf().

Incidentally, it looks like the separator is a semi-colon, not a comma.

[tlvlx]

Thanks for the reply..I will try again and see if it would work....=)