Fgets reads last line twice

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WebAug 7, 2011 · Here's one way: if ( ($line = fgets (...)) !== false) { if (meets_criteria ($line)) { b ($line); } else { a ($line); }; while ( ($line = fgets (...)) !== false) { a ($line); }; }; Feel … WebNov 7, 2024 · while ( fgets(string, 30, file) != NULL ) { printf("%s", string); } fgets() will fail and return NULL before feof(file) becomes true, and it won't update string. So right now …

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WebApr 20, 2014 · The loop runs twice because when you enter a non- q character, you actually enter two characters - the non- q character and the newline '\n' character. x = getc (stdin); reads the non- q character from the stdin stream but the newline is still lying in the buffer of stdin which is read in the next getc call. You should use fgets to read a line ... WebThe net effect of this is that you process the last line in the file twice. Some simple solutions would be to either put the feof test immediately after the fgets call instead of before it, or … fanatic movie review

c - Fgets() only able to read one line (last line) - Stack Overflow

WebApr 1, 2013 · you have to remove the \n from the string format of the scanf.It should be. scanf("%s",a); EDIT: Explanation. the %s means that the scanf reads the input character till it gets a delimiter which should be a white space like space or tab or new line(\n) so the first enter is get as a delimiter for the "%s" and adding the "\n" to the string format "%s\n" … WebOct 26, 2014 · I don't want the last line to be printed or written twice , what am I doing wrong , help! !feof (f1) is wrong. EOF will be one more loop after reading the last line from … WebNov 17, 2013 · The last line of the original file shows duplicated in the new file. In the example given: data.txt. line1 line2 line3 line4 line5. The line5 (last line of the original file) … corduroy pants men\u0027s baggy

input - C Programming - Calling fgets() twice? - Stack Overflow

Prevent the loop from reading the last file line twice - C

WebLast line of file read twice in C I'm getting back to C programming and decided to try to write a code that reads a file with multiple ints inside and counts how many of them have values that range in a certain amount. But for some reason the code reads the last line twice and counts 1 more int than its supposed to. How can I fix that? fanatic mvWebI know it only reads the last line as I have done various tests, seeing if it could find a substring and it can only find it if it's on the last line. CODE: //Input FILE *ptr_file; //fclose … corduroy pants in the 80s

"WebLast line of file being read twice I'm getting back to C programming and decided to try to write a code that reads a file with multiple ints inside and counts how many of them have values that range in a certain amount. But for some reason the code reads the last line twice and counts 1 more int than its supposed to. How can I fix that? " - Fgets reads last line twice

Fgets reads last line twice

c - Final Line of a Text File is Printed Twice - Stack Overflow

WebNov 29, 2013 · You have to do this (as for your question) int n2=0; int n3=0; sync = fopen ("database.txt", "r"); if ( sync ) { while ( fgets (line, 1024, sync) !=NULL ) { // Just search for the latest line, do nothing in the loop } printf ("Last line %s\n", line); // WebMay 14, 2024 · The reason you have to press enter again after the input is likely due to this: while ( (ch = getchar ()) != '\n' && ch != EOF); fgets already read the newline so you …

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WebIf you've already (tried to) process that previous read then it's too late. Check the state of infile before you do anything. You actually have to "hit" the end-of-file for it to be detected. If you have the filesize info elsewhere, you can use that to control the loop. WebJul 22, 2005 · sometime reads the last line twice. Can anyone please tell me why this is happenning? This is kind of urgent so your speedy help will be greatly appreciated. …

WebEDIT: to clarify fgets IS reading one line at a time, not reading the whole file at once - it reads one line at a time, the while loop runs, but then once the end of the file is reached it immediately loops back to the start of the file and reads one line at a time again. WebThe fgets () function fixes the possible overflow problem by taking a second argument that limits the number of characters to be read. This function is designed for file input, which makes it a little more awkward to use. It takes a second argument indicating the maximum number of characters to read. If this argument has the value n, fgets ...

WebJul 1, 2016 · However, beyond about 1/4 gigabytes it gets pretty slow; I have had it working on reading 1.2 gigabytes for several minutes now, and the time it is taking leaves me wondering whether the internals are growing the array dynamically with lots of copying (rather than, for example, scanning ahead to determine how far away the line terminator … WebMay 4, 2016 · So, I used fgets() to read this line of integers and store it in a char str []. As expected str [0] == 17, but str [1] == 7, an so on... every 2 digits the integer is stored in …

WebJan 28, 2024 · Based on the explanation of fgets, it seems that fgets should stop whenever it reads n-1 characters, hit the EOF or hit a newline character. For example, I create a …

Webyes ..last line. jephthah 1,888. 13 Years Ago. okay, then you do this: (1) open the file using "fopen". (2) use a while loop to read each line into a string buffer using "fgets" until a NULL is returned. (3) when fgets returns a NULL, it means there are no more lines. the last line read will still be in your string buffer. fanatic mugsWebJan 21, 2024 · In my C program, I call fgets () twice to get input from the user. However, on the second call of fgets () (which is in a function), it doesn't wait for the input to be taken, … corduroy pants mens ll beanWebJan 21, 2024 · 1 Answer Sorted by: 4 fgets (str, 2, stdin); You're providing too little space for fgets. You only allow it to read one character (since 2 includes the 0-terminator). The newline will always be left in the input buffer so the next stdio operation will read it. Share Improve this answer Follow answered Feb 25, 2012 at 15:39 cnicutar 177k 25 360 391 fanatico boys heidenheimWebMay 26, 2024 · Fgets in C++ repeats last line. FILE* soubor; char buffer [100]; soubor = fopen ("file","r"); string outp = ""; while (! feof (soubor)) { fgets (buffer,100,soubor); fputs (buffer , stdout); } fclose (soubor); it repeats last line of file twice. I have this … corduroy pants made in englandWebJan 17, 2014 · 19. In your case, the last line is seemingly read twice, except that it isn't. The last call to fgets returns NULL to indicate the the end of file has been read. You … fanaticoffee bogorWebOct 16, 2013 · A terminating null byte ('\0') is stored after the last character in the buffer. When you want to compare line , before you need to remove \n before null byte. If you … corduroy pants indieWebJan 28, 2024 · Based on the explanation of fgets, it seems that fgets should stop whenever it reads n-1 characters, hit the EOF or hit a newline character. For example, I create a text file like below: red 100 yellow 400 blue 300 green 500 purple 1000 ... The color and the integer is separated by a tab. corduroy pants men style