Numeros de lychrel

#include <stdio.h>
int main(){
	int x,aux,dig,cp,y,i=1,lych=1,aux2,f,q;
	double inv,sum,num1;
	printf("introduce numero de casos de prueba: ");
	scanf("%i",&f);

	do{
	i=1;
	lych=1;
	aux2=0;
	inv=0;
	sum=0;
	printf("introduce un numero:");
	scanf("%i",&x);
	aux=x;
	do{
	inv=0;
	sum=0;
	while(aux!=0){
		dig=aux%10;
		aux/=10;
		inv*=10;
		inv+=dig;
	}
	if(i==1){
	sum=x+inv;
	cp=sum;
	y=0;
	while(cp!=0){
		dig=cp%10;
		cp=cp/10;
		y=y*10;
		y=y+dig;
		}
		if(y!=sum){
			i++;
			aux=sum+y;
			x=aux;
			num1=x;
		}
		else if(y==sum){
			aux2=1;
			num1=sum;
		}
	}

	else{
		if(x!=inv){
			i++;
			sum=x+inv;
			x=sum;
			aux=sum;
			num1=x;
		}
		else{
			aux2=1;
		}
		if(sum>1000000000){
			lych=0;
		}
	}

	}while(aux2!=1&&lych!=0);

	if(aux2==1){
		printf("%i, %.f",i,num1);
	}else if(lych==0){
		printf("lycherl?.\n");
	}
	printf("\n");
	q++;
	}while(q<f);

	system("pause");
	return 0;
	}