C Programming - Declarations and Initializations - Discussion

#include<stdio.h>
int main()
{
    extern int fun(float);
    int a;
    a = fun(3.14);
    printf("%d\n", a);
    return 0;
}
int fun(int aa)
{
	return (int)++aa;
}

---

---

---

---

---

---

---

---

---

---

---

---