C++new delete 動態(tài)申請二維數(shù)組 - 微溫的便當(dāng) - 博客園

C++new delete 動態(tài)申請二維數(shù)組

學(xué)C++的時候, 課本上沒說介紹怎么用new delete 來申請動態(tài)二維數(shù)組空間, 網(wǎng)上也找不到簡潔的代碼, 于是自己寫出如下:

以二維int型數(shù)組為例——

cin>>m>>n; ?//m,n分別為行數(shù)和列數(shù)

int ** p;
p = new int*[m];
for( int i = 0; i < m; i++ )
p[i] = new int[n];

然后就可以如二維數(shù)組給p[i][j]賦值了.

代碼解釋:?

以一個指針的指針指向一個指針數(shù)組, 然后給指針數(shù)組里的每個指針申請一維空間.

最后 別忘了釋放 :

for( int i = 0; i < m; i++ )
delete[]p[i];
delete[]p;

介紹完畢!

C++new delete 動態(tài)申請二維數(shù)組