c++

[Solved] i have been on this question for quaring the document for two days straight, and it is not working. don’t want to cheat, can you point the problem

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Introduction If you’ve been struggling with a document for two days and can’t seem to get it to work, you’re not alone. Many people have difficulty understanding the complexities of document formatting and troubleshooting. Fortunately, there are many resources available to help you solve your problem. In this post, we’ll discuss some tips and tricks … Read more

[Solved] How to use realloc in a function in C

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You want to modify the value of an int* (your array) so need to pass a pointer to it into your increase function: void increase(int** data) { *data = realloc(*data, 5 * sizeof int); } Calling code would then look like: int *data = malloc(4 * sizeof *data); /* do stuff with data */ increase(&data); … Read more

[Solved] Error when coding my own implementation of realloc()

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Invalid assumption: void *my_realloc(void *ptr, size_t size) { unsigned char *old_ptr = (unsigned char *)ptr; You’re breaking the realloc() specification here. realloc() doesn’t assume that the ptr would always be pointing to a string. It is type-agnostic. And the cast is redundant. There’s an implicit conversion from void * to any other pointer type. Undefined … Read more

[Solved] How to grow a pointer or an array in C at runtime (without knowing the end length at compile time)

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OP’s mostly has it. It is just printing the first element each time. // printf(“%d”, *arr); printf(“%d”, arr[n-1]); is it possible to do it with an array? No. In C an array cannot change size once it is defined. The memory size allocated and referenced by a pointer can change though. solved How to grow … Read more

[Solved] How to shrink at runtime a struct matrix (using realloc() for example)

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You should reduce the number of columsn, not rows. Not mat1 but mat1->array should be reallocated. Not nrow and ncol (not updated) but mat1->nrows and mat1->ncols (updated) should be used for the new size. The elements are size_t, so allocating for int mayn’t be enough. Using the variable for calculating size is safe. In the … Read more

[Solved] Dynamically allocated C array suddenly getting modified [closed]

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At least this statement array->values = realloc(array->values, array->capacity); shall be rewritten like array->values = realloc(array->values, array->capacity * sizeof( Value ) ); Though it would be more safer to use an intermediate pointer like for example Value *tmp = realloc(array->values, array->capacity * sizeof( Value ) ); if ( tmp != NULL ) { array->values = tmp; … Read more

[Solved] malloc: *** error for object 0x147606ac0: pointer being realloc’d was not allocated

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Introduction The malloc: *** error for object 0x147606ac0: pointer being realloc’d was not allocated is a common error encountered when attempting to reallocate memory in C programming. This error occurs when a pointer is passed to the realloc() function, but the pointer was not allocated with malloc() or calloc() beforehand. This error can be caused … Read more

[Solved] malloc: *** error for object 0x147606ac0: pointer being realloc’d was not allocated

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The function is not updating the caller’s value of client_details, you need one more level of pointer: void func(struct client_detail **client_details,int *size){ *client_details = realloc(*client_details, (*size + 1) * sizeof(**client_details)); *size = *size + 1; } int main() { struct group_detail *group_details = malloc(0 * sizeof(*group_details)); struct client_detail *client_details = malloc(1 * sizeof(*client_details)); int size … Read more

[Solved] c# Regex catch string between two string [duplicate]

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You can try this:<[a-z\s]+id=[\’\”]mobile[\w]+[\’\”][\sa-zA-Z\d\’\=\;\:]*>([a-zA-Z\d\s]+)<[\/a-z\s]+> Anyway it will not match special chars or symbols. You can test and optimize it here: https://regex101.com/r/fnYQ1o/10 EDIT – Code example This could be the portion of code to extract the messages: var rgx = @”<[a-z\s]+id=[\’]mobile[\w]+[\’][\sa-zA-Z\d\s\’\=\;\:]*>([a-zA-Z\d\s]+)<[\/a-z\s]+>”; var txt = “<!DOCTYPE html><html lang=’it’ xml:lang=’it’><!– <![endif]–><head><meta http-equiv=’Content-Type’ content=”text/html; charset=UTF-8”><title>Banca Mediolanum S.p.A. | Accesso … Read more

[Solved] how to make of slopes/terrain? [closed]

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You can create something like that procedurally. I just created a behaviour that will create a senoidal track much like your picture above: // written by ‘imerso’ as a StackOverflow answer. using System.Collections; using System.Collections.Generic; using UnityEngine; public class SlopeTerrain : MonoBehaviour { public int heightInMeters = 5; public int widthInMeters = 128; public float … Read more