C programming scan text file

The first parameter stream is the pointer to the file. The second parameter is the position of the record to be found, and the third parameter specifies the location where the offset starts. This program will start reading the records from the file program. Course Index Explore Programiz.

Popular Tutorials Data Types in C. C for Loop. Arrays in C Programming. Pointers in C. Find roots of a quadratic equation. Print Pyramids and Patterns. Check prime number. Print the Fibonacci series. Reference Materials string. Start Learning C. Explore C Examples. Related Topics Write a Sentence to a File.

Read the First Line From a File. C clearerr. Display its own Source Code as Output. C "Hello, World! C File Handling In this tutorial, you will learn about file handling in C. A file is a container in computer storage devices used for storing data. Why files are needed? When a program is terminated, the entire data is lost. Storing in a file will preserve your data even if the program terminates. If you have to enter a large number of data, it will take a lot of time to enter them all.

However, if you have a file containing all the data, you can easily access the contents of the file using a few commands in C. You can easily move your data from one computer to another without any changes. How can I move the scanner down to the next line after it has executed this code. Thank you in advance for any help. EOF is only returned when the very first conversion has failed. The proper way would be:. You should check return value from fscanf. This function returns number of succesful conversions, which may be less than number of conversions specified in format string.

In your case, it may mean that no conversions may have been performed in second call to fscanf , becaude of malformed data in file etc. As no data was read, file handle has not advanced, so end-of-file hasn't been reached, which in turn explains why loop does not terminate. As no data was read, previous values are printed in each loop iteration. Suspect you may want to skip over any leading whitespace, so begin format with " ".

I am sure this is contributing to your end-less loop. Vicious cycle repeats. Scan the second trash field and save to add to the scan count. This helps validate the incoming data is formatted as expected. BTW, recommend using fgets to get the line and use sscanf to tear apart. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? I have to create matrices multiple times, and I just need help scanning in the numbers.

Here's what I have so far, but It's not working: Code:. Read from the file with fgets Read from the string with sscanf Question would I start off with: [code] while fgets buffer, sizeofbuffer, fin! Why use fgets and then sscanf instead of fscanf? Fact - Beethoven wrote his first symphony in C.

Originally Posted by GenghisAhn. I don't know if I agree with that Especially because the OP is dealing with a file, not a stream. I agree with qny's approach, except that I'd use a nested loop like this: Code:. All fgets does is put the line in a buffer first - And then you are using sscanf which has the same problems as fscanf.