047:指针练习：ForEach
总时间限制: 1000ms 内存限制: 65536kB
描述
程序填空，使得输出结果为：

1,4,9,16,25,
h,e,l,l,o,!,

#include <iostream>
using namespace std;

void ForEach(void * a, int width, int num,
// 在此处补充你的代码
)

{
    for(int i = 0;i < num; ++i) 
        f((char*)a+width*i);
}

void PrintSquare(void * p)
{
    int * q = (int*)p;
    int n = *q;
    cout << n * n << ",";
}
void PrintChar(void * p) {
    char * q = (char*)p;
    cout << *q << ",";
}
int main()
{
    int a[5] = {1,2,3,4,5};
    char s[] = "hello!";
    ForEach(a,sizeof(int),5,PrintSquare); 
    cout << endl;
    ForEach(s,sizeof(char),6,PrintChar);
    return 0;
}

输入
无
输出
1,4,9,16,25,
h,e,l,l,o,!,
样例输入
无
样例输出
1,4,9,16,25,
h,e,l,l,o,!,
代码

#include <iostream>
using namespace std;

void ForEach(void * a, int width, int num,
void (*f)(void *)// 在此处补充你的代码
)

{
    for(int i = 0;i < num; ++i) 
        f((char*)a+width*i);
}

void PrintSquare(void * p)
{
    int * q = (int*)p;
    int n = *q;
    cout << n * n << ",";
}
void PrintChar(void * p) {
    char * q = (char*)p;
    cout << *q << ",";
}
int main()
{
    int a[5] = {1,2,3,4,5};
    char s[] = "hello!";
    ForEach(a,sizeof(int),5,PrintSquare); 
    cout << endl;
    ForEach(s,sizeof(char),6,PrintChar);
    return 0;
}