Simple in-efficient calculator help!

[krazymanrebirth]

If tested with input 12+12 it only prints the first integer (input1)

I want it to space it out and do the simple math like:

Input: 12+12
Output: 12 + 12 = 24

I know the math isnt there yet, im trying to get the getchar/putchar to work first. Also the class can only use getchar/putchar, so no string functions like isdigit or anything.
Thanks again guys!

#include <stdio.h>

int main(void)
{

	int input1;
	int oper;
	int input2;
	int numflag=0;
	int signflag=0;
	int end = 0;

	/**Number 1**/
	while ((input1 = getchar() ) && end!=1)
	{
		if ((input1 >= '0') && (input1 <= '9'))
		{
			putchar(input1);
			numflag=1;
		}
		else if (numflag==1)
		{
			putchar(' ');
			numflag=0;
			end=1;
		}
	}
	/**Operator**/
	while ((oper = getchar() ) && end!=1)
	{
		if ((input1 == '+') || (input1 == '-') || (input1 == '*')
				|| (input1 == '/') || (input1 == '%'))
		{
			putchar(oper);
			numflag=1;
		}
		else if (numflag==1)
		{
			putchar(' ');
			numflag=0;
			end=1;
		}
	}
	/**Number 2**/

	while ((input2 = getchar() ) && end!=1)
	{
		if ((input2 >= '0') && (input2 <= '9'))
		{
			putchar(input2);
			numflag=1;
		}
		else if (numflag==1)
		{
			putchar(' ');
			numflag=0;
			end=1;
		}
	}
	
return 0;

}

[tabstop]

No reason to read the operator separately; it's already sitting in input1 -- it's what causes the loop to break.