Question

c++合并A，B数组形成一个新的数组C

Answer 1

#include "stdafx.h"
#include <iostream>
using namespace std;

void MergeArray(int a[], int aCount, int b[], int blen)//aCount为a数组实际（狭义）长度，blen为b数组实际长度
{
int len = aCount + blen - 1;//合并数组的长度也就是a数组的广义长度
aCount--;
blen--;
while (aCount>=0 && blen>=0)
{
if (a[aCount] >= b[blen])
{
a[len--] = a[aCount--];
}
else
{
a[len--] = b[blen--];
}
}
while(blen >= 0)
{
a[len--] = b[blen--];
}

}

int _tmain(int argc, _TCHAR* argv[])
{
int a[] = {2,4,6,8,10,0,0,0,0,0};
int b[] = {1,3,5,7,9};

MergeArray(a,5,b,5);
for (int i = 0; i < sizeof(a)/sizeof(a[0]); i++)
{
cout<<a[i]<<" ";
}
getchar();
return 0;
}

Answer 2

char* combine(char*a, int sizea, char* b, int sizeb)
{
char* target = new char[sizea+sizeb];
memcpy(target, a, sizea);
memcpy(target+sizea, b, sizeb);
return target;//用完后自己释放
}

Answer 3

string a,b,c;
c=a+b;