将一个方阵旋转90度

#include <iostream>

using namespace std;

int** create_matrix(int row, int col)
{
int **m = new int* [row];
for(int i = 0; i < row; i++){
m[i] = new int[col];
}

return m;
}

void delete_matrix(int** m, int row)
{
for(int i = 0; i < row; i ++){
delete[] m[i];
}

delete []m;
}

void print_matrix(int** m, int row, int col)
{
for(int i = 0; i < row; i ++){
for(int j = 0; j < col; j++){
cout << m[i][j] << "  ";
}
cout << endl;
}
}

void initial_matrix(int **m, int row, int col)
{
for(int i = 0; i < row; i++){
for(int j = 0; j < col; j ++){
m[i][j] = rand() % 100;
}
}
}

void rotate_matrix(int **m, int size)
{
for(int level = 0; level < size / 2; level ++){
for(int i = level; i < size - level - 1; i ++){
int t = m[level][i];
m[level][i] = m[i][size - 1 - level];
m[i][size - 1 - level] = m[size - 1 - level][size - 1 - i];
m[size - 1 - level][size - 1 - i] = m[size - 1 - i][level];
m[size - 1 - i][level] = t;
}
}
}

int main(int argc, char* argv[])
{
int size = 6;

int **m = create_matrix(size, size);
int i,j;

initial_matrix(m, size, size);
cout << "before rotating" << endl;
print_matrix(m, size, size);

rotate_matrix(m, size);

cout << "after rotating" << endl;
print_matrix(m, size, size);

return 0;
}

before rotating
41  67  34  0  69  24
78  58  62  64  5  45
81  27  61  91  95  42
27  36  91  4  2  53
92  82  21  16  18  95
47  26  71  38  69  12
after rotating
24  45  42  53  95  12
69  5  95  2  18  69
0  64  91  4  16  38
34  62  61  91  21  71
67  58  27  36  82  26
41  78  81  27  92  47