CODEWITHSUNDEEP
cstruct
user3292534
user3292534

Reputation:

struct.field returns another value, why?

My goal is to create an fisrt of my custom struct type. When run, prints out 24. Can't understand why:

#include <stdio.h>
typedef struct strktura {
    int number;
    char name;
} strktura;

strktura new_one(int number, char name){
    strktura a;
    a.number=number;
    a.name=name;
}

main()
{
        strktura first=new_one(2,"A");
        printf("%d\n",first.number);
}

Upvotes: 0

Views: 48

Answers (2)

h3xc0ntr0l
h3xc0ntr0l

Reputation: 399

You need to add a 

return a;

in your new_one() function so that the structure gets returned from the function new_one()

Upvotes: 0

Sourav Ghosh
Sourav Ghosh

Reputation: 134336

You forgot to return from new_one().

Related Reading: From chapter 6.9.1, paragraph 12, C11 document,

If the } that terminates a function is reached, and the value of the function call is used by the caller, the behavior is undefined.

So, in your code, without a return from new_one() and by accessing the return value through printf("%d\n",first.number);, you're facing undefined behaviour.

Also, worthy to mention, the correct syntax for main() is int main(), (and a matching return 0 is a good practice.)

Upvotes: 4

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