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;
}
