3Â¥: Originally posted by martialvv at 2014-10-15 16:51:22
лл£¬ºÜ¸øÁ¦£¬ÎÒ²âÊԳɹ¦ÁË¡£Ö»ÊÇÓÐÒ»µã²»Ì«Àí½â£¬¾ÍÊÇÊÍ·ÅÄÚ´æµÄÄÇÁ½¾ä£¬ÎªÊ²Ã´Ö»ÊÍ·Åmat[] ¾Í¿ÉÒÔ£¬¶ø²»ÓÃÊÍ·Å mat[] i´Ó1µ½dim-1 ?
ÎÒ¿´±ðÈ˵ijÌÐòÊÇÖ±½Ó¶ÔÓÚptr²Ù×÷£¬ÎÒÀí½âÕâ¶Î³ÌÐò¾ÍÊÇ·ÖÅä¸ödim*dimµÄÄÚ´æ ...

//·ÖÅäÄÚ´æ
int *ptr = new int [dim*dim];
int **mat = new int *[dim];
for (int i = 0; i < dim; i++) mat[i] = &ptr[i*dim];
// ³õʼ»¯
memset(mat[0], 0, dim*dim*sizeof(int));
// ÊÍ·Å
delete [] mat[0];
delete [] mat;

2Â¥: Originally posted by Â̱éɽԭ at 2014-10-15 14:12:49
//·ÖÅäÄÚ´æ
int *ptr = new int ;
int **mat = new int *;
for (int i = 0; i < dim; i++) mat = &ptr;
// ³õʼ»¯
memset(mat, 0, dim*dim*sizeof(int));
// ÊÍ·Å
delete [] mat;
delete [] mat;
...

2Â¥: Originally posted by Â̱éɽԭ at 2014-10-15 14:12:49
//·ÖÅäÄÚ´æ
int *ptr = new int ;
int **mat = new int *;
for (int i = 0; i < dim; i++) mat = &ptr;
// ³õʼ»¯
memset(mat, 0, dim*dim*sizeof(int));
// ÊÍ·Å
delete [] mat;
delete [] mat;
...