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;
...

//·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;
...

3Â¥: Originally posted by martialvv at 2014-10-15 16:51:22
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