Scanning a line in a document

[bc120]

Can anyone help me with the code for scanning a line in a document.

Here is an example of the document:

Something here (Varies from 100-500 lines)

2001.12.25 (time) Start Time
Weather for 2001.12.25 (number)

Something here (Varies from (10-50 lines)

And I need to scan the "Start Time" and "Weather" lines for the "time" and "number".

Here is the code im using:

sscanf(starttime, "2001.12.25 %d Start Time",&stime);
sscanf(weather, "Weather for 2001.12.25 %d",&wthr);

If my document only contains the 2 lines it scans them. But if contains other lines before and after it won't. Do any of you know a way to help?

Thanks, Will be waiting for responses.
BC

[GaPe]

Well, you could search for the string "weather" and "start time" in the file.

[quzah]

Use fgets in a loop to read a line at a time into a buffer. Then use sscanf on the buffer to search for your text.

Quzah.

[bc120]

I used a for loop and used fgets and sscanf, but it doesnt seem to scan in the values I need.

Here is the code im using:

lines = # of lines in file
readfile is a FILE *

for(i = 0; i < lines; i++)
{
fgets(starttime, sizeof(starttime), readfile);
sscanf(startime, "%d Start Time", &stime);

fgets(weather, sizeof(weather), readfile);
sscanf(weather, "Weather %d", &wthr);
}

Can anyone help me with the code?

[Salem]

#include <stdio.h>
#include <string.h>

// Something here (Varies from 100-500 lines)
// 2001.12.25 (time) Start Time 
// Weather for 2001.12.25 (number)
// Something here (Varies from (10-50 lines)

int main ( ) {
    char buff[BUFSIZ];
    FILE *fp;
    int  stime, wthr;    // surely they're more than just ints?

    // open the file, check for errors
    fp = fopen( "file.txt", "r" );
    if ( fp == NULL ) {
        perror( "Cannot open file" );
        exit( 1 );
    }

    // read each line
    while ( fgets(buff,BUFSIZ,fp) != NULL ) {
        // check each line, to see if it contains our magic words
        if ( strstr(buff,"Start Time") != NULL ) {
            // a start time, extract the data
            // %*s means skip a string - RTM for more details
            if ( sscanf(buff, "%*s %d Start Time",&stime) == 1 ) {
                printf( "Time Value=%d\n", stime );
            }
        }
        if ( strstr(buff,"Weather for") != NULL ) {
            if ( sscanf(buff, "Weather for %*s %d",&wthr) == 1 ) {
                printf( "Weather Value=%d\n", wthr );
            }
        }
    }

    fclose( fp );
    return 0;
}

[bc120]

Thanks for the help,

Program seems to be working fine now.

BC