C语言详解函数与指针的使用

#include <stdio.h>
 
typedef int(FUNC)(int);
 
int test(int i)
{
    return i * i;
}
 
void f()
{
    printf("Call f()...\n");
}
 
int main()
{
    FUNC* pt = test;
    void(*pf)() = &f;
    
    printf("pf = %p\n", pf);
    printf("f = %p\n", f);
    printf("&f = %p\n", &f);
    
    pf();
    
    (*pf)();
    
    printf("Function pointer call: %d\n", pt(2));
    
    return 0;
}
 

#include <stdio.h>
 
typedef int(*Weapon)(int);
 
void fight(Weapon wp, int arg)
{
    int result = 0;
    
    printf("Fight boss!\n");
    
    result = wp(arg);
    
    printf("Boss loss: %d\n", result);
}
 
int knife(int n)
{
    int ret = 0;
    int i = 0;
    
    for(i=0; i<n; i++)
    {
        printf("Knife attack: %d\n", 1);
        ret++;
    }
    
    return ret;
}
 
int sword(int n)
{
    int ret = 0;
    int i = 0;
    
    for(i=0; i<n; i++)
    {
        printf("SWord attack: %d\n", 5);
        ret += 5;
    }
    
    return ret;
}
 
int gun(int n)
{
    int ret = 0;
    int i = 0;
    
    for(i=0; i<n; i++)
    {
        printf("Gun attack: %d\n", 10);
        ret += 10;
    }
    
    return ret;
}
 
int main()
{
    fight(knife, 3);
    fight(sword, 4);
    fight(gun, 5);
    
    return 0;
}