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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 :


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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]);
        printf("\n");
    }
    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"
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