Maximum-Minimum using pointer

#include<stdio.h>
void main( void )
{
int i ,m, q;
int *j , *k,*l;
j = &i;
k=&m;l=&q;

printf("Insert first  number: ");
scanf("%d", j);
printf("\nInsert second number: ");
scanf("%d", k);
printf("\nInsert third  number: ");
scanf("%d", l);
printf("\n");


if(*j>*k)
{
if(*j>*l)
{
if(*k>*l)
{
printf("Maximum number is: %d\n", i);
printf("Minimum number is: %d\n", q);
}
else
{
printf("Maximum number is: %d\n", i);
printf("Minimum number is: %d\n", m);
}
}
else
{
printf("Maximum number is: %d\n", q);
printf("Minimum number is: %d\n", m);
}
}
else if(*k>*l)
{
if(*j>*l)
{
printf("Maximum number is: %d\n", m);
printf("Minimum number is: %d\n", q);
}
else
{
printf("Maximum number is: %d\n", m);
printf("Minimum number is: %d\n", i);
}
}
else
{
printf("Maximum number is: %d\n", q);
printf("Minimum number is: %d\n", i);
}
printf("\n");
}