Guess Output - Bansal Sir

What would be the output of this..

Code:

#include<stdio.h>

int main()
{
int a;
char c;
a=1;
while(a<5)
{
scanf("%d",&c);
printf("%d",a);
a++;
}
}


Explain the ouput for the cases when c entered is a
1)digit
2)character
3)symbol like +,-,/ etc

can u please explain it?