指针练习：SwapMemory

总时间限制: 

1000ms

 

内存限制: 

65536kB

描述

填写内存交换函数 SwapMemory，使得程序输出指定结果

#include <iostream>
using namespace std;
void SwapMemory(void * m1,void * m2, int size)
{

// 在此处补充你的代码

}

void PrintIntArray(int * a,int n)
{
	for(int i = 0;i < n; ++i)
		cout << a[i] << ",";
	cout << endl;
}

int main()
{
	int a[5] = {1,2,3,4,5};
	int b[5] = {10,20,30,40,50};
	SwapMemory(a,b,5 * sizeof(int));
	PrintIntArray(a,5);
	PrintIntArray(b,5);
	char s1[] = "12345";
	char s2[] = "abcde";
	SwapMemory(s1,s2,5);
	cout << s1 << endl;
	cout << s2 << endl;
	return 0;
}

输入

无

输出

10,20,30,40,50,
1,2,3,4,5,
abcde
12345

样例输入

无

样例输出

10,20,30,40,50,
1,2,3,4,5,
abcde
12345

来源

Guo Wei

源代码：

char* p1 = (char*)m1;
char* p2 = (char*)m2;
for(int i=0; i<size; i++) {
char tmp = p1[i];
p1[i] = p2[i];
p2[i] = tmp;
}