Algorithm:

• Start the program
• Only one disk can be moved at a time.
• Each move consists of taking the upper disk from one of the stacks and placing it on top of another stack i.e. a disk can only be moved if it is the uppermost disk on a stack.
• No disk may be placed on top of a smaller disk.
• Stop the program

Program:

#include <stdio.h>

void towerOfHanoi(int n, char from_rod, char to_rod, char aux_rod)
{
if (n == 1)
{
printf(“\n Move disk 1 from rod %c to rod %c”, from_rod, to_rod);
return;
}
towerOfHanoi(n-1, from_rod, aux_rod, to_rod);
printf(“\n Move disk %d from rod %c to rod %c”, n, from_rod, to_rod);
towerOfHanoi(n-1, aux_rod, to_rod, from_rod);
}

int main()
{
int n = 4;
towerOfHanoi(n, \’A\’, \’C\’, \’B\’); // A, B and C are names of rods
return 0;
}

Output:

Move disk 1 from rod A to rod B
Move disk 2 from rod A to rod C
Move disk 1 from rod B to rod C
Move disk 3 from rod A to rod B
Move disk 1 from rod C to rod A
Move disk 2 from rod C to rod B
Move disk 1 from rod A to rod B
Move disk 4 from rod A to rod C
Move disk 1 from rod B to rod C
Move disk 2 from rod B to rod A
Move disk 1 from rod C to rod A
Move disk 3 from rod B to rod C
Move disk 1 from rod A to rod B
Move disk 2 from rod A to rod C
Move disk 1 from rod B to rod C