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#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?

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  • Kindly show your research / debugging effort so far. Please read How to Ask page first. Commented Jul 9, 2017 at 6:22
  • prog.c:7:30: error: declaration does not declare anything Commented Jul 9, 2017 at 6:26
  • Give it a name. struct nodein{int in; }; --> struct nodein{int in; } s_in; then p->s_in.in = 42; Commented Jul 9, 2017 at 6:29

1 Answer 1

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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);
}
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