numeros rom

#include <stdio.h>

int main{
	int input,dig1,dig2,dig3,dig4;
	char i='i', v='v', x='x', l='l', c='c', d='d', m='m';
	printf ("Ingrese un número enter entre 1 y 3500:\n");
	scanf ("%d", &input);
		pdig1=input/1000;  //3
		dig1=pdig1*1000;	// 3000
		pdig2=(input-dig1)/100; //5
		dig2=pdig2*100; //500
		pdig3=((input-dig1)-dig2)/10;	//2
		dig3=pdig3*10; //20
		dig4=((input-dig1)-dig2)-dig3; //3
		//probcen
		if (pdig2<=3 && pdig2>=1){
			caso=1;
			}
		else if (pdig2==4){
			caso=2
		}
		else if (pdig2==5){
			caso=3;
		}
		else if (pdig2>5 && pdig<9){
			caso=4;
			}
		switch (caso){
			case 1:
				for (i=1;i=pdig2;i++){
					printf ("%c", c);
				}
				break;
			case 2:
				printf("%c%c",c,d);
				break;
			case 3:

		}