Thread: Can anyone change this into C format?

Then I suggest you learn how classes works. You should know the ?: operator if you know C++.

I didn't actually get that.

Anyway, this is homework.

I haven't tested this much, so it might need a bit of work. But it should give to the general idea -

Code:

#include <stdlib.h> 
#include <stdio.h>

struct cell
{
	int disc; 
	struct cell *next; 
};

void cellInit1(struct cell* p,int d)
{
	p->disc = d; 
	p->next = p; 
}

void cellInit2(struct cell* p,int d, struct cell **n)
{
	p->disc=d;
	p->next=*n;
}

struct list{
	struct cell *rear; 
};


int empty(struct list* p) { 
	return p->rear == p->rear->next;
 } 


void pop(struct list* p,int *i) 
{ 
	
	struct cell *front;
	*i = 0; 
	if( empty(p) ) return; 
	front = p->rear->next; 
	p->rear->next = front->next; 
	*i =front->disc; 
	free(front);
	
} 

void push(struct list* p,int d) { 

	struct cell* temp = p->rear->next;
	p->rear->next = malloc(sizeof(struct cell));
	cellInit2(p->rear->next,d,&temp); 
} 



void listInit(struct list* p) {
	p->rear = malloc(sizeof(struct cell));
	cellInit1(p->rear,0); 
} 

void listKill(struct list* p){ 
	int i;
	while(!empty(p)) pop(p,&i); 
} 
 


struct list pegs[3]; 

typedef int (*oper)(int); 

int decr(int a) 
{ 
	a--; 
	if(a<0) 
	a=2; 
	return a; 
} 

int incr(int a) 
{ 
	a = (a+1)%3; 
	return a; 
} 



int main(void) 
{ 
	int n; 
	int i;
	oper incr_decr; 
	int curr=0; 
	int p1 = 1, p2 = 2; 
	int d0,d1,d2; 
	listInit(&pegs[0]);
	listInit(&pegs[1]);
	listInit(&pegs[2]);
	printf("Enter Number Of Discs:");
	scanf("%d",&n);  
 
	for( i = n; i > 0; i--) 
	push(&pegs[0],i); 
	incr_decr = n%2 ? decr : incr; //conditional statement 
	while(1) 
	{ 
		pop(&pegs[curr],&d0); 
		printf("Disc %d From %d",d0,curr); 
		curr = incr_decr(curr); 
		push(&(*(&pegs[curr])),d0); 
		printf(" To %d\n",curr); 
		p1 = incr_decr(p1); 
		p2 = incr_decr(p2); 
	if(!empty(&pegs[p1]) && !empty(&pegs[p2])) 
	{ 
		pop(&pegs[p1],&d1); 
		pop(&pegs[p2],&d2); 

		if(d1 < d2) 
		{ 
			push(&pegs[p2],d2); 
			push(&pegs[p2],d1); 
			printf("Disc %d From %d To %d\n",d1,p1,p2); 
		} 
		else 
		{ 
			push(&pegs[p1],d1); 
			push(&pegs[p1],d2); 
			printf("Disc %d From %d To %d\n",d2,p2,p1); 
		} 
	} 
	else 
	{ 
		if(empty(&pegs[p1]) && empty(&pegs[p2])) 
			break; 
		if(empty(&pegs[p1])) 
		{ 
			pop(&pegs[p2],&d2); 
			push(&pegs[p1],d2); 
			printf("Disc %d From %d To %d\n",d2,p2,p1); 
		} 
		else 
		{ 
			pop(&pegs[p1],&d1); 
			push(&pegs[p2],d1); 
			printf("Disc %d From %d To %d\n",d1,p1,p2); 
		} 
	} 
} 
	listKill(&pegs[0]);
	listKill(&pegs[1]);
	listKill(&pegs[2]);
	return 0; 
}