Xcode – Pointers explanation in C++
I am self learning C++ and I found my self on the Pointers section of C++. To my understanding the pointer allocates the value of a variable to a memory. But I came across on this problem which the answer…
Visual Studio Code – Why does this code work as expected if I use Visual C(Visual Sudio 2022) but doesn't if I use gcc 8.2?
I am new to C and still learning(currently doing some "LeetCode" challenges). I wrote a function that should return the longest common prefix in an array of strings. I tested with a couple different values and all works fine. But…
calling member function pointer from static member function – Ubuntu
I'm writing a program that uses SDL_Audio and dynamically produces sound, but I'm finding that my implementation isn't very responsive with latency varying from .3 to .5 seconds. My suspicion is that I produce sound long before the sound card…
In C, can you omit the parameter types of a function pointer when initializing it with the address of a declared function? – Ubuntu
I'm trying to make sure I understand the syntax for function pointers in C. I know it's just a pointer to a specific type. That being said, why does the following code compile and print '10'? (Note I'm using GCC…
Json – Set int64 value to *int64 pointer
I need map the struct to create a JSON structure. The collector_id attribute in JSON should be able to take null value or int value. I hace the follow code: type purchaseInfo struct { CollectorID *int64 `json:"collector_id"` } func mapPurchaseInfo(collectorID…
Visual Studio Code – Why I am not receiving a hexadecimal number as output when I print a pointer address with %p?
I have written a program while learning pointers in c and facing a problem. My code was to print the address of the variable which should be a hexadecimal number. But why I am receiving an integer number instead of…
Using function pointer with class or function in php – PHP Versions
I am converting an old project that uses all functions to use a class. Not all installed instances will be updated so I have to have the code work with the function or the class but I can't get it…
Pointers showing abnormal Behaviour – Ubuntu
So, I am practicing pointers in detail. I just studied that if we perform operations like - int a = 1025; int *ptr = &a; printf("The size of integer is = %dn", sizeof(int)); printf("The address = %d, value = %dn",…
Postgresql – How to connect to database once and do many queries thru a single connection using SQLX module in my Go web application?
My project is web back-end that using Go http framework: gin-gonic/gin module. My example repository PostgreSQL database I am using a remote hosted database (Render) and jmoiron/sqlx module to connect to PostgreSQL database. With the local database exactly the same…
Calling C function from Swift shows different results in CLion than in Xcode – Ios swift
I am trying to call a C function from Swift , but I do not know exactly how to define variables to pass parameters. This is the function declaration: /* Function Declarations */ extern void compute_feature_set(const double input[11025], double M_data[],…