logo
down
shadow

Generate random number for member in struct


Generate random number for member in struct

By : user2953906
Date : November 21 2020, 07:31 AM
seems to work fine Move srand(time(NULL)); to main().
If you call it in a very short interval the random seed is always the same and that's why you get the same value.
code :


Share : facebook icon twitter icon
How do you generate a random number between [1, n] using a random generator that generates a floating point number betwe

How do you generate a random number between [1, n] using a random generator that generates a floating point number betwe


By : user3714877
Date : March 29 2020, 07:55 AM
With these it helps Suppose you have a random number generator that generates a random floating point number between [0.0, 1.0) such as drand48, how can you create a random number generator that generates an integer between [1, n]. , Multiply by n, take the floor, and add 1.
generate random numbers (no member generate exist error)

generate random numbers (no member generate exist error)


By : Siddartha
Date : March 29 2020, 07:55 AM
This might help you The engine std::mt19937 requires a seed in its constructor. You are passing it an std::random_device. It looks like you intended to do something like
code :
Engine::Engine() : m_generator(m_seed()), m_distribution(0, 36) {}
                                     ^^
private:
    std::random_device m_seed;
    std::mt19937 m_generator;
    std::uniform_int_distribution<int> m_distribution;
Engine::Engine() : m_generator(std::random_device()()), 
                   m_distribution(0, 36) {}
Generate random string for member of struct

Generate random string for member of struct


By : Piers Lafond
Date : November 21 2020, 07:31 AM
To fix this issue I would like to know how I can generate a random string for a member of a struct and assign this value to the member of the struct. , This will generate random string of lowercase characters
code :
void
generate_random_string(char *string, size_t length)
{
    size_t i;
    for (i = 0 ; i < length - 1 ; i++)
        string[i] = rand() % ('z' - 'a') + 'a';
    string[length - 1] = '\0';
}
generate_random_string(s.name, sizeof(s.name));
How to make a member function of a class in C++ generate a different random number each time it is called?

How to make a member function of a class in C++ generate a different random number each time it is called?


By : user3736111
Date : March 29 2020, 07:55 AM
With these it helps I have a class which also includes a random number engine and its distribution: , You define your dist and eng variables in the class
code :
protected:
  engine rng;
  distribution dist; // Here
  void func();
C::C()
{   .
    .
    .  
    unsigned seed = std::chrono::system_clock::now().time_since_epoch().count();
    distribution dist(0.0, pow(10,12)); // Here
    engine rng(seed);
}
C::C()
{   .
    .
    .  
    unsigned seed = std::chrono::system_clock::now().time_since_epoch().count();
    dist = distribution(0.0, pow(10,12)); // Here
    rng = engine(seed);
}
C() : dist(0.0, pow(10, 12)),
  rng(std::chrono::system_clock::now().time_since_epoch().count())
Generate random numbers for member of struct

Generate random numbers for member of struct


By : Sanny
Date : March 29 2020, 07:55 AM
Does that help The following snippet of code solves your problem basing on your comment below. You haven't completely understood how to use structure perhaps. Note that to use member of a structure you must use the . symbol
code :
struct BigInt {
    int *A;
};

struct BigInt bigIntVar = {
    NULL
};

printf("Number");
int len;
scanf("%i", &len);

bigIntVar.A = (int*)malloc(len * sizeof(int));

srand(time(NULL));
int i = 0;

while (i != len) {
    int r = rand() % 10;
    bigIntVar.A[i] = r + 1;

    printf("\nr:%i\n", r);
    printf("A[i]:%d", bigIntVar.A[i]);
    i++;
}
Related Posts Related Posts :
  • How to transmit data from an interrupt handler to an user application?
  • Why do I get the error "bash: ./a.out: Permission denied" when I execute a C program in Linux mint 15
  • syntax of sigchld and its declaration
  • error using g_idle_add() in C++, same thing works in C
  • why if else or nested if else are called single statement in C
  • How do I interpret this printf in C
  • load the functions of a shell script without executing it
  • Is FilterSendNetBufferLists handler a must for an NDIS filter to use NdisFSendNetBufferLists?
  • How to write to flash memory using inline assembly?
  • More Return Statements vs. More Indentation
  • How to show an image on a PictureBox from resource?
  • Having malloced some memory,I could't calculator the proper size of the memories I malloced.I don't know why
  • What is the main difference between integer pointer and character pointer?
  • Why are some functions declared extern and header file not included in source in Git source code?
  • what is the use of fflush(stdin) in c programming
  • Is it safe to return file File descriptor locally allocated from another function In C
  • Changing undefined values of an array
  • What does an empty parameter list mean?
  • using strtol on a string literal causing segmentation fault
  • Same structure objects memory overlap?
  • C-Linux-Any way to pass command "history" to Linux shell?
  • Using #define in defining string size C
  • How to use thread pool and message queues in Multithreaded Matrix Multiplication?
  • Can't find how to select path to run a C program
  • Automatic variable in C not initialized but given fixed value within loop
  • main() function defined without return type gives warning
  • Output of following code with integer, float, char variable
  • why buffer memory allocation error in opencl
  • Why am I getting this error during run-time?
  • Strange behaviour of the pow function
  • task in increment , decrement , printf() , why these are evaluated in this manner in C
  • 28 extra bytes in bss
  • Waiting for multiple events without polling
  • Why are my variables reporting as "undeclared identifier" when compiling?
  • Correct AddNode function but somehing happens when I printf
  • When I traverse in the splay tree, then now which one is root?
  • Data type conversion in Postfix evaluation
  • No output in terminal (Head First C)
  • Data writes over after realloc
  • function: findnextchar() doesn't work
  • Getting file-size property from Nautilus
  • Forward declare entities in C standard library?
  • Static array in C
  • Function signature indicates return type void*, but returns pointer of a different type
  • How do I measure time per thread in C?
  • Online judgeProblem (Wrong Answer)
  • Use function pointer initialized in other source file
  • last line of file is duplicated using fscanf
  • How to print files with same month of modification using directory in c?
  • ADT Circular Queue enqueue and dequeue
  • What events can cause ferror to return non-zero?
  • Accessing dynamically allocated structure received through socket
  • Vim with C Conditional Parsing
  • C can pointers be aligned with any other data type?
  • sdcc inline asm() not working
  • I/O - Manipulation of C Strings
  • sscanf 1 byte hex data without overflow
  • Avoid division by zero in C when taking log with respect to a random number
  • C - memory corruption with threads
  • Why does my program sometimes returns 0xc0000005 and sometimes runs well?
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org