logo
Tags down

shadow

Proper fscanf in C


By : totino56
Date : September 13 2020, 09:00 AM
it helps some times There are multiple errors in the scanf format.
Here is the correct scanf format string:
code :
" %[^,], %[^#]#%d/%d/%d %[^(](%[^)]) %[^/]/%d"


Share : facebook icon twitter icon

How to determine, inside of "while(fscanf != EOF){blah}", if the next fscanf is going to return EOF?


By : user1955782
Date : March 29 2020, 07:55 AM
I wish this helpful for you Couldn't you just modify the while condition to account for these additional conditions?
code :
while(fscanf(...) != EOF || !(some_other_conditions_met)) 

reading files: How file pointer is moved using fscanf and how scanf/fscanf work with missing %type


By : Charles Okorafor
Date : March 29 2020, 07:55 AM
I hope this helps .
The rule is very simple: fgets() reads an entire line, unless the length of the line exceeds the provided buffer, in which case it reads as much as it can. fscanf(), on the other hand, reads what you tell it to, skipping the preceding whitespace. For example, given a line "1 2 3" (without quotes), fgets() will read the whole line, while fscanf(fp, "%d %d", &i1, &i2) will read two integers and store them to the provided addresses, and leave " 3" (note included whitespace) unread.

How can I skip a value and go to the next one in fscanf(), and how can I fscanf() a specific type


By : user2451048
Date : March 29 2020, 07:55 AM
I wish did fix the issue. How can I skip a value and go to the next one in fscanf()? For example I have the following data in my input file:
code :
int fun() {
 int unusedvar;
 float value;
 FILE *fp=fopen("yourfilename","r");
 fscanf(fp,"%d%f",&unusedvar,&value);
 return 0;
}

Why in the given piece of code `fgetc()` function gave proper output whereas `fscanf()` failed to do so?


By : user77
Date : March 29 2020, 07:55 AM
help you fix your problem The following piece of code worked : , The problem is that you're assigning the result of fscanf to ch:
code :
    ch = fscanf ( fp, "%c", &ch ) ;  //to read the characters from read.txt
//  ^^^^^---- here
    if ( ch == EOF )
        break ;
if (fscanf ( fp, "%c", &ch ) != 1) {
    break;
if (fscanf ( fp, "%c", &ch ) == EOF) {
    break;

Using fscanf in C


By : Andrew Cogswell
Date : March 29 2020, 07:55 AM
it helps some times [] is a type all in itself, you shouldn't append s or d at the its end. All you really have to do is change the format to this:
Related Posts Related Posts :
  • C LANG Using array to read in colums as well as rows
  • ISR_INT0_PD2 won't work but main function is infinitely working ATMEGA32
  • After writing to a place in mmapped memory, when printing it out afterwards, it's not written anymore
  • How is malloc() than free() works
  • strcpy() in c gives me segmentation fault
  • What is the best practice when declaring a user defined array?
  • Efficient Assembly multiplication
  • while (getchar != '\n'); alternative to clear the buffer
  • How to fill a number with a variable amount of 0s?
  • Why C programming gives different output?
  • How to get float value from uint32_t?
  • What is the output of expression c=a+++b? If a=2,b=5 in c language...?
  • Why does it print 1 at the end?
  • Caesar cipher for numbers in C
  • Could someone explain the method of making rules for connect 4 game in C?
  • Is it a memory leak in C when code fails to free memory, but the OS will anyway?
  • Why can't I initialize a loop with i = -1?
  • How does the fork() function behave in if statements?
  • Why strcpy_s is safer than strcpy?
  • gcc flags to disable arithmetic optimisations
  • Recursion in c to print characters
  • Character array initialization using for loop
  • C Programming - Cannot Call Function More Than Once
  • Structures and pointer to pointer element
  • Error when initializing struct members in struct definition
  • Is that fixed-size array? a[]
  • It is not outputting what was expected and am unsure as to the issue
  • i want use C shell code to make buffer overflow and execute bin/sh
  • what the main function in this program returns to os?
  • Suffixes for integer types
  • I don't understand why a equals 1 and b equals 0 in this program
  • C prints other integer number than what it shows on Watches. Why is that?
  • Output of the for loop?
  • How to find 64-bit divisions in existing C code?
  • Finding a numbers with the largest/smallest number of bits set
  • how does " for (int j = 0; j < n || !putchar('\n'); j++) " work
  • handle ctrl+c in client-server socket in c programing
  • Restrict a process to read "/etc/resolv.conf" file in linux
  • Restrict scope of global variable inside one file in C
  • Arduino AES128 encryption - decryption problem
  • Why is not ampersand needed in the following code?
  • Is it possible to define a function name with #define?
  • Why is the size of the data type different when the value is directly passed to the sizeof operator?
  • Segmentation fault / Incorrect checksum triggered ocasionally when reading lines from a file
  • Adding bits at specific indexes for a uint8_t block
  • how can I use "shadow call stack" feature of clang-8 in x86_64?
  • malloc Assertion Failed
  • Array of structs inside of another struct in C
  • Why does this print the wrong part of the string?
  • Moving the cursor and printing characters in console doesn't work with sleep
  • Confusion in adding an element to a sorted list of integers
  • How I can separate integer number in 3 "houses"? Hundred, Ten and Unity
  • User-implemented memory management
  • What it entails to declare and initialize a pointer in this way: int (*p)[n]
  • Function to look though any struct in C
  • Microcontroller not recognized at USB port when connected via pins
  • Unexpected bitshift behavior in C
  • Model 3D spring from points
  • C control reaches end of non void function
  • Tax outputting 0
  • shadow
    Privacy Policy - Terms - Contact Us © 35dp-dentalpractice.co.uk