C - matrix rotation -

i'm writing program in c , need m x n matrix rotate clockwise. tried algorithms, work in n x n matrices.

the matrix {(1,4), (2,5), (3,6)} should become {(3,2,1), (6,5,4)}:

1 4 2 5  ->  3 2 1 3 6      6 5 4 

i wrote piece of code transpose matrix, , don't know how swap columns:

void transpose(int matrix[max][max], int m, int n)  {      int transpose[max][max], d, c;        (c = 0; c < m; c++)        for( d = 0 ; d < n ; d++)           transpose[d][c] = matrix[c][d];        (c = 0; c < n; c++)          for(d = 0; d < m; d++)              matrix[c][d] = transpose[c][d];  }

here's idea. i've implemented in java, should work in same manner in c. idea read array row major wise end, , fill other array column major wise, beginning.

    int a[][]={{1,4},{2,5},{3,6}};     int m=3,n=2;   //you need edit , calculate rows , columns.      int b[][]=new int[n][m];      for(int i=m-1; i>=0; i--)       for(int j=0; j<n; j++)         b[j][m-i-1]=a[i][j];       for(int i=0; i<n; i++) {         for(int j=0; j<m; j++)            system.out.print(b[i][j]+"\t");         system.out.println();     } 

output at: https://ideone.com/tveub5