CODEWITHSUNDEEP
cmemory-managementstruct
Manali Kumar
Manali Kumar

Reputation: 35

Memory allocation for struct

When is memory for a structure allocated in C? Is it when I declare it or when I create an instance of it? Also, why can static variables not be used within a struct?

Upvotes: 1

Views: 91

Answers (1)

Mr. Branch
Mr. Branch

Reputation: 442

When you define a structure you are NOT allocating memory for it, that's the reason why you can use typedef to avoid writing struct my_struct_name. When you define a structure, you're declaring a data type that's why they don't take up data until you declare an instance of that structure.

struct point{   int x;  int y; };

This will not take up space until in a function or main you declare one like for example

int main(void){

    struct point mypoint1,mypoint2;//THIS IS WHEN MEMORY STARTS BEING ALLOCATED
    return 0;
}

Regarding the static, I don't think there's actually a point to declare a static to a structure? Why would you make an variable static to a structure?

Upvotes: 1

Related Questions