a.c

#include <stdio.h>

struct A {
    int a;
    char b;
};

struct A foo() {
    struct A a;
    a.a = 3;
    a.b = 'c';
    return a;
}

int main() {
   struct A b = foo();
   printf("%d %c\n", b.a, b.b);
   return 0;
}