NettetI have a function that takes a file pointer and returns the next non-blank line of text (removing comments as well). However, even though the code works in main it obviously doesn't work when isolated in a function because it is unable to move the file pointer outside of its scope. Nettet4. mai 2016 · How to move to next line while reading/writing a file in C++. I want to know how to move to the next line while reading or writing a file in C++. I tried to move from …
How to go to the begining of a line in a file in c - C
Nettet26. jul. 2011 · 345. I want to read 2numbers fore every loop. (139.344 for first loop. 140.345 for 2nd loop) If you are using the numbers sequentially, read the file sequentially using fscanf () or fgets () don't mess with the file pointer. In text files fseek () is extremely unreliable due to the possibility of hidden characters (trailing tabs, trailing ... NettetDefinition and Usage. The fseek () function seeks in an open file. This function moves the file pointer from its current position to a new position, forward or backward, specified by the number of bytes. Tip: You can find the current position by using ftell ()! mersea wildlife blog
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NettetOpen the following badpoem.txt file and perform read operations (which advance the position pointer) and then use seek to move to a new position in the file. Use fopen to open the file. Then, use ftell to query the current position. fid = fopen ( 'badpoem.txt' ); ftell (fid) ans = 0. Read the first three lines and query the position in the file ... Nettet29. sep. 2024 · Also don't forget "end of file" - you may reach the end of the file while you're still in the middle of a line (and can handle that by pretending the last line in the file ended with an "end of line" when it didn't). Note that fscanf (inptr, "%c", &in); is extremely bad (you might spend most of your CPU time in this function parsing the format ... Nettet16. feb. 2003 · Sure, but the idea is the same. When your condition is met read till a '\n' and. jump 'n' places to the beginning of the next line. as you say. icici (IS/IT- … mersea webcam