I am writing a program that will verify that a given set of moves on the Towers of Hanoi will end with a solution. I have written the code below for a 3 disk game, but I can't figure out how to make this code recursive. It is a really long piece of code considering its only for 3 disks. I'm pretty sure there is a way to make it recursive, but I am just stumped. Help will be greatly appreciated. Code: #include <stdio.h> int tower1[3] = {1,2,3}; int tower2[3] = {0,0,0}; int tower3[3] = {0,0,0}; int moves[2][7] = {{1,1,2,1,3,3,1}, {2,3,3,2,1,2,2}}; //set of moves //function to move the disks void moveDisk(int towerFrom, int towerTo) { int temp = 0; int i = 0; int k = 2; if(towerFrom == 1 && towerTo == 2) //take top disc from tower 1 and place on tower 2 { while(i < 3) { if(tower1[i] != 0) { temp = tower1[i]; tower1[i] = 0; break; }//end if else i++; } while(k >= 0) { if(temp > tower2[k+1] && k <= 1) { printf("Invalid move."); exit(); } if(tower2[k] == 0) { tower2[k] = temp; break; } else k--; } } if(towerFrom == 1 && towerTo == 3)//take top disk from tower 1 and move to tower 3 { i=0; k=2; while(i < 3) { if(tower1[i] != 0) { temp = tower1[i]; tower1[i] = 0; break; }//end if else i++; } while(k >= 0) { if(temp > tower3[k+1] && k <= 1) { printf("Invalid move."); exit(); } if(tower3[k] == 0) { tower3[k] = temp; break; } else k--; } } if(towerFrom == 2 && towerTo == 3)//take top disk from tower 2 and place on tower 3 { i=0; k=2; while(i < 3) { if(tower2[i] != 0) { temp = tower2[i]; tower2[i] = 0; break; }//end if else i++; } while(k >= 0) { if(temp > tower3[k+1] && k <= 1) { printf("Invalid move."); exit(); } if(tower3[k] == 0) { tower3[k] = temp; break; } else k--; } } if(towerFrom == 2 && towerTo == 1)//take top disk from tower 2 and place on tower 1 { i=0; k=2; while(i < 3) { if(tower2[i] != 0) { temp = tower2[i]; tower2[i] = 0; break; }//end if else i++; } while(k >= 0) { if(temp > tower1[k+1] && k <= 1) { printf("Invalid move."); exit(); } if(tower1[k] == 0) { tower1[k] = temp; break; } else k--; } } if(towerFrom == 3 && towerTo == 1)//take top disk from tower 3 and place on tower 1 { i=0; k=2; while(i < 3) { if(tower3[i] != 0) { temp = tower3[i]; tower3[i] = 0; break; }//end if else i++; } while(k >= 0) { if(temp > tower1[k+1] && k <= 1) { printf("Invalid move."); exit(); } if(tower1[k] == 0) { tower1[k] = temp; break; } else k--; } } if(towerFrom == 3 && towerTo == 2)//take top disk off tower 3 and place on tower 2 { i=0; k=2; while(i < 3) { if(tower3[i] != 0) { temp = tower3[i]; tower3[i] = 0; break; }//end if else i++; } while(k >= 0) { if(temp > tower2[k+1] && k <= 1) { printf("Invalid move."); exit(); } if(tower2[k] == 0) { tower2[k] = temp; break; } else k--; } } } void main() { moveDisk(moves[0][0], moves[1][0]); system("pause"); printf("%d %d %d \n", tower1[0], tower2[0], tower3[0]); printf("%d %d %d \n", tower1[1], tower2[1], tower3[1]); printf("%d %d %d \n", tower1[2], tower2[2], tower3[2]); moveDisk(moves[0][1], moves[1][1]); system("pause"); printf("%d %d %d \n", tower1[0], tower2[0], tower3[0]); printf("%d %d %d \n", tower1[1], tower2[1], tower3[1]); printf("%d %d %d \n", tower1[2], tower2[2], tower3[2]); moveDisk(moves[0][2], moves[1][2]); system("pause"); printf("%d %d %d \n", tower1[0], tower2[0], tower3[0]); printf("%d %d %d \n", tower1[1], tower2[1], tower3[1]); printf("%d %d %d \n", tower1[2], tower2[2], tower3[2]); moveDisk(moves[0][3], moves[1][3]); system("pause"); printf("%d %d %d \n", tower1[0], tower2[0], tower3[0]); printf("%d %d %d \n", tower1[1], tower2[1], tower3[1]); printf("%d %d %d \n", tower1[2], tower2[2], tower3[2]); moveDisk(moves[0][4], moves[1][4]); system("pause"); printf("%d %d %d \n", tower1[0], tower2[0], tower3[0]); printf("%d %d %d \n", tower1[1], tower2[1], tower3[1]); printf("%d %d %d \n", tower1[2], tower2[2], tower3[2]); moveDisk(moves[0][5], moves[1][5]); system("pause"); printf("%d %d %d \n", tower1[0], tower2[0], tower3[0]); printf("%d %d %d \n", tower1[1], tower2[1], tower3[1]); printf("%d %d %d \n", tower1[2], tower2[2], tower3[2]); moveDisk(moves[0][6], moves[1][6]); system("pause"); printf("%d %d %d \n", tower1[0], tower2[0], tower3[0]); printf("%d %d %d \n", tower1[1], tower2[1], tower3[1]); printf("%d %d %d \n", tower1[2], tower2[2], tower3[2]); };
