Weird behavior of printf in C++ with a newline character

Weird behavior of printf in C++ with a newline character

By : user2950785
Date : November 17 2020, 11:58 AM
hope this fix your issue To explain what you are seeing from argv[1] + '\n'. This is pointer plus integer (character constants have type int in C).
The definition of that in C is that the pointer is advanced by as many units as are in the integer. \n is 10 in ASCII so this will advance the pointer by 10 characters. If your string is shorter than 10 then you're now reading whatever is in memory beyond the end of that string.
code :

Share : facebook icon twitter icon
Weird behavior in C printf

Weird behavior in C printf

By : Mary Catman
Date : March 29 2020, 07:55 AM
This might help you There are 73 lines of code in your program in the question, 50 of which are irrelevant to the workings of the program. Please study how to create an SSCCE (Short, Self-Contained, Correct Example) so that people don't have to wade through 3 times as much code as necessary.
Here's a 22 line program that works:
code :
#include <cstring>
#include <cstdio>

const int MAXS = 107;

int main(void)
    char str[MAXS];

    while (fgets(str, sizeof(str), stdin) != 0)
        int N = strlen(str);
        if (str[N-1] == '\n')
            str[--N] = '\0';
        for (int i = N / 2 - 1; i >= 0; i--)
            printf("%c", str[i]);
        for (int i = N - 1; i > N / 2 - 1; i--)
            printf("%c", str[i]);
    return 0;
Printf prints unwanted newline-character

Printf prints unwanted newline-character

By : user7384108
Date : March 29 2020, 07:55 AM
Any of those help The fgets function will copy the new line character into the string when it reads it in from the console. Hence second_string ends in a new line character, that is printed to the screen as a new line. You need to remove that from the string if you don't want it to appear
weird behavior with printf ()

weird behavior with printf ()

By : user3203343
Date : March 29 2020, 07:55 AM
wish helps you The problem with your code provided in the link link is that
code :
for( i = 0; i > m; i++)
Weird printf behavior

Weird printf behavior

By : เพัด เพัด
Date : March 29 2020, 07:55 AM
will help you Since you are writing the potato over a socket, it is likely that as it gets larger, you eventually hit the limit of how much your operating system will send in a single send/recv call. Make sure that your socket processing code checks the return value to see how much data was actually received and calls recv again if necessary.
The issue is likely nondeterministic and not actually related to the actual value you store in the array. The change you have described will result in the same machine code being generated which runs in the same amount of time. The network however is always nondeterministic.
How to add newline character with trailing spaces with printf?

How to add newline character with trailing spaces with printf?

By : user3676875
Date : March 29 2020, 07:55 AM
it should still fix some issue I have the following printf command that works correctly adding 5 spaces after the string ABC and then prints string "DEF". , You may use $'\n' to get a newline:
code :
printf '%s%*s' "ABC" 5 '' $'DEF\n'
printf '%s%*s\n' "ABC" 5 '' "DEF"
Related Posts Related Posts :
  • Vector of pointers: some clarification needed
  • scaling a bitmap without losing quality
  • How to evaluate a function directly?
  • QNetworkAccessManager: How to change post data at createRequest function
  • Returning std::move of a local variable
  • Is there a fast linear SVM library with a good C++ interface?
  • What is the purpose of name mangling in C++?
  • C++ Why the void function is not working eventhough I called it?
  • How the pointer and the pointer's adress can share the same memory adress?
  • error C2220: warning treated as error - no 'object' file generated
  • exception of strcpy function in c++ console program
  • How to access USB barcode scanner data directly from USB port using C/C++ without driver
  • Under which circumstances will std::vector.clear() call a destructor?
  • Template partial specialisation and dependent names
  • best way to share data between c codes
  • C++ ignores if statement conditions
  • How to set the argv[ ] to be case-insensitive in a Win32 Console Application?
  • How to fix error "clang: error: linker (via gcc) command failed with exit code 1 (use -v to see invocation)"?
  • C++ How do I print a .txt file verbatim?
  • Creating two dimensional array of class
  • How do I correctly use COMMTIMEOUTS with OVERLAPPED IO mode reading from a Serial port
  • An assert macro which expands to static_assert when possible?
  • How to write a copyconstructor for a class which has HANDLE as a member in win32 c++ application?
  • C++ saving info such as tree in a file
  • Transforming an expression template tree
  • How to overload an operator with multiple parameters like a + b + c?
  • C++ 11 with Raspberry Pi performances
  • Make a C++ class look like a numpy array using swig
  • Postfix incrementer overloading for nested enumerated types
  • Is there a tidy way of associating metadata with functions in C++
  • QObject::installEventFilter(): Cannot filter events for objects in a different thread
  • LNK2005 error with Zxing C++
  • C++ Doubly Linked List with Pointers: Object of class isn't constructed properly
  • Using a random string generator in c++ constructor
  • What should I use instead of void as one of the alternative types in an variant?
  • C++ return value from multithreads using reference
  • How to connect multiple TCP IP clients to same server port using c++
  • Defaul compiler generates the reference operator (In C++)?
  • Unable to change directory time stamp after using FILE_FLAG_BACKUP_SEMANTICS
  • vector handling displaying output
  • WSAGetLastError returns WSAENOTSOCK - Cause?
  • C++: How to overload pow for user type?
  • C++ using arrays as multidimensional despite initalising it as 1D with pointer
  • How negate std::is_integral for use in tag dispatch?
  • Retrieve serial number from USB memory (Windows environment c++)
  • g++ error: invalid preprocessing directive #INCLUDE
  • C++ What is the std::for_each() function parameter type?
  • C++: Read individual lines from text file, sort words alphabetically
  • Saving 'this' address into a variable
  • c++ command line arguments in ubuntu terminal
  • Convert "Cartesian coordinates" to "polar coordinates with respect to user specified origin"
  • In what order are local scoped objects destructed?
  • How to use SDL_MapRGB with SDL 2.0
  • how compiler and interpreter work in case of array declaration
  • GSL integration behaves strange
  • Cropping an image with OpenCV and C
  • Find the last line in text file and select the first 10 char and print to a new file?
  • Created many CCSprits but when triggering ccTouchBegan gives the last one allways
  • seekp and seekg don't work with fstream
  • Taking input in Sublime Text 3
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org