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  1. Replies
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    CHAR_BIT can never be less than 8. See 5.2.4.2.1...

    CHAR_BIT can never be less than 8.
    See 5.2.4.2.1 of the C11 standard.
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    Nobody tried to "figure it out".

    Nobody tried to "figure it out".
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    Your code doesn't make any sense. Presumably you...

    Your code doesn't make any sense.
    Presumably you mean something like this:


    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>

    char **f() // no need to pass the variable in
    {
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    Page 13 of N1570...

    Page 13 of N1570 says
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    If you want to ignore a parameter: #include...

    If you want to ignore a parameter:


    #include <stdio.h>

    int main(int argc, char **argv) {
    (void)argv;
    printf("%d\n", argc);
    return 0;
    }
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    You created the arrays to be a certain size....

    You created the arrays to be a certain size.
    That is the size they are.
    They do not magically change their size just because you try to access memory outside the array bounds.

    BTW, I didn't say...
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    Array a is m elements long. Array b is n elements...

    Array a is m elements long. Array b is n elements long.
    So neither of them is big enough to hold n + m elements.
  8. Maybe you are supposed to ignore a bit that...

    Maybe you are supposed to ignore a bit that overflows (at least under certain conditions). Then the answer is 1, as expected.
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    Presumably your first example is supposed to call...

    Presumably your first example is supposed to call foo1 and your second is supposed to call foo2 (with a properly defined s).

    The postfix increment operator has higher precedence than the...
  10. Assuming they are all supposed to be transformed...

    Assuming they are all supposed to be transformed into some kind of 2-d array, here are some possibilities.



    #include <stdio.h>
    #include <stdlib.h>
    #include <time.h>

    // For allocation of...
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    okay

    okay
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    pmatrix needs to be a triple pointer to be able...

    pmatrix needs to be a triple pointer to be able to set it to NULL in the caller.


    void freeMatrix(pixel *** pmatrix, size_t rows){
    for (int i = 0; i < rows; ++i)
    ...
  13. In the future, remember that it is best to post a...

    In the future, remember that it is best to post a complete program (headers,main,etc) so that we can easily run (or try to compile) it.

    The compiler does not know how to set a Planet to a char....
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    That's not the actual reason getchar returns an...

    That's not the actual reason getchar returns an int. The reason is so that EOF can be chosen to be a bit pattern that can never occur in a char (an "out-of-band" value). Obviously that means it must...
  15. Thread: Using modf()

    by john.c
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    #include #include int...

    #include <iostream>
    #include <cmath>

    int main() {
    float value = 123.456;
    float whole, part = std::modf(value, &whole);
    std::cout << value << '\n' << whole << '\n' << part << '\n';...
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    @christop, Obviously it's undefined behavior....

    @christop, Obviously it's undefined behavior. That's not the point. And I have no problem with printf printing "(null)". The point is how does the printf get called at all? Why doesn't it blow up as...
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    Dereferencing mystery?

    I find it strange that NULL is passed to printf below. Since p is NULL, it seems more likely that p->s would blow up before the function call.


    #include <stdio.h>

    typedef struct {
    char...
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    Your input file is text, not binary. If you need...

    Your input file is text, not binary.
    If you need your output to be binary, what exactly is the format?
    I've output to a text file below, one integer per line.
    Never say ios::in for an ifstream or...
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    ` 2 3 5 ...

    ` 2 3 5 7 11 13 17 19 23 29 31 37 41
    1: 1 1
    2: 2 2 1
    3: 4 ...
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    ` Prime Factors Ord ...

    ` Prime Factors
    Ord Value Divs 2 3 5 7 11 13 17 19
    1: 1 1
    2: 2 2 1
    3: 4 3 2
    4: 6 4 1...
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    You don't know what you're talking about. It...

    You don't know what you're talking about.
    It makes perfect sense.
    Of course it should be "allowed".
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    65525, actually, but yes, wraparound is...

    65525, actually, but yes, wraparound is well-defined with unsigned values.


    #include <stdio.h>
    #include <stdint.h>

    int main()
    {
    uint16_t n = (uint16_t)(-1); // -1 interpreted as...
  23. As usual, I don't understand what you are trying...

    As usual, I don't understand what you are trying to do. The code doesn't make sense to me and you've never really been able to explain what in the world you are trying to do overall. I'm lost. It's...
  24. I didn't test it and forgot some closing...

    I didn't test it and forgot some closing double-quotes.
    But you put them in the wrong place.
    Note that you should probably use _pclose to close a FILE* opened with _popen.


    FILE* dns =...
  25. It may have been overly-complicated (showing two...

    It may have been overly-complicated (showing two different ways and using inttypes).
    How about this.


    #include <stdio.h>
    #include <string.h>

    int main()
    {
    FILE *in = fopen("input.txt",...
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