#include <bits/stdc++.h>
using namespace std;

void Double(int * p, int n) {
    for(int i = 0; i < n; ++i)
        p[i] *= 2;
}

int main() {
    int a[3][4] = { { 1, 2, 3, 4}, {5, 6, 7, 8},
        { 9, 10, 11, 12 }
    };

    Double(*a+4,6);
    for(int i = 0; i < 3; ++i) {
        for(int j = 0; j < 4; ++j)
            cout << a[i][j] << ",";
        cout << endl;
    }
    return 0;
}

包ac的 每日批判

#include <bits/stdc++.h>
using namespace std;

void Double(int * p, int n) {
    for(int i = 0; i < n; ++i)
        p[i] *= 2;
}

int main() {
    int a[3][4] = { { 1, 2, 3, 4}, {5, 6, 7, 8},
        { 9, 10, 11, 12 }
    };

    Double(a[1],6);// 在该行补充你的代码
    for(int i = 0; i < 3; ++i) {
        for(int j = 0; j < 4; ++j)
            cout << a[i][j] << ",";
        cout << endl;
    }
    return 0;
}

#include<iostream>
#include<queue>
#include<stack>
#include<cmath>
#include<algorithm>
#include<cstring>
using namespace std;   
int main ()
{
    int *a,b[13]={0,12,11,20,18,16,14,12,10,4,3,2,1};
    int i=12;
    while(i>=0)
    {
    	a=&b[i];
    	i--;
    	cout<<*a<<","; 
    	if(i%4==0)
    	{
    		cout<<endl;
		}
	} 
	return 0;
}

不要抄哦 （.-.）

:）

using namespace std;

void Double(int * p, int n) {
    for(int i = 0; i < n; ++i)
        p[i] *= 2;
}

int main() {
    int a[3][4] = { { 1, 2, 3, 4}, {5, 6, 7, 8},
        { 9, 10, 11, 12 }
    };

    Double(a[1],6);// 在该行补充你的代码
    for(int i = 0; i < 3; ++i) {
        for(int j = 0; j < 4; ++j)
            cout << a[i][j] << ",";
        cout << endl;
    }
    return 0;
}