Nested Structure Initialization

Question

#include<stdio.h>
#include<stdlib.h>
int main(){
     struct nodeout
     {
      int out;
      struct nodein{int in; }; 
     };

     struct nodeout* p;
     p=(struct nodeout*)malloc(sizeof(struct nodeout));
     p->out=10;

     printf("%d",p->out);
 } 

..Here is my code..How can I initialize the variable 'in' which is inside the structure nodein?

Answer 1

You did define struct nodein but did not define the nodein member for struct nodeout.

Do as following:

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

int main(){
    struct nodeout
    {
        int out;
        struct nodein {int in; } node_in; 
    };

    struct nodeout* p;
    p = (struct nodeout*)malloc(sizeof(struct nodeout));
    p->out = 10;
    p->node_in.in = 5

    printf("%d %d”, p->out, p->node_in.in);
}