017 二维数组类
作者:互联网
#include <iostream>
#include <cstring>
using namespace std;
class Array2 {
public:
int x, y;
int * p;
Array2() {}
Array2(int xx, int yy) :x(xx), y(yy),p(nullptr) {
p = new int[xx*yy];
}
int * operator[] (int i) {
return &p[i * y];
}
int& operator() (int i, int j) {
return p[i * y+j];
}
Array2 & operator= (const Array2 & b) {
x = b.x;
y = b.y;
p = new int[b.x * b.y];
memcpy(p, b.p, x * y * sizeof(int));
return *this;
}
~Array2() {
if (p != nullptr) {
delete[] p;
p = nullptr;
}
}
};
int main() {
Array2 a(3,4);
int i,j;
for( i = 0;i < 3; ++i )
for( j = 0; j < 4; j ++ )
a[i][j] = i * 4 + j;
for( i = 0;i < 3; ++i ) {
for( j = 0; j < 4; j ++ ) {
cout << a(i,j) << ",";
}
cout << endl;
}
cout << "next" << endl;
Array2 b; b = a;
for( i = 0;i < 3; ++i ) {
for( j = 0; j < 4; j ++ ) {
cout << b[i][j] << ",";
}
cout << endl;
}
return 0;
}
标签:return,int,Array2,xx,++,二维,数组,017,operator 来源: https://www.cnblogs.com/icefield817/p/15915929.html