A bit of help needed with loops

[Phanta]

Good evening, I'm basically doing a program that does something like this:
You enter two integers -4 and 6 which represent intervals
Then the loop does this:
(-4) + (-3) + (-2) + (-1) + 0 + 1 + 2 + 3 + 4 + 5 + 6
After that it prints out the sum of everything added. Furthermore if a number which is
added consists of 2 or more digits, the program adds the digits of the number instead the
whole number. Like this:
8 and 10
8+9+1+0

Here's what I got:

#include <stdlib.h>
#include <stdio.h>

/* The Beginning of the procedure*/

int main()
{
int integer1; /* First number */
int integer2,temp; /* Second number */
int temp2,temp3,temp4;
int sum,x; /* Variable in which sum will be stored */

printf("Hello, this program calculates between intervals");
printf("\n","");
printf("Enter the first integer:\n");
scanf("%d",&integer1);
printf("Enter the second integer:\n");
scanf("%d",&integer2);
if (integer2<integer1) {
                       temp = integer1;
                       integer1 = integer2;
                       integer2 = temp;
                       }
printf("The beginning of the interval is: %d\n",integer1);
printf("The end of the interval is: %d\n",integer2);
sum = 0;
temp4 = 0;
for (x = integer1;integer1 < integer2;integer1++);
    {
    sum = integer1 + (integer1 +1);
    }
printf("The sum is: %d\n",sum);
/*while (integer1>9) 
      {
       integer1 = integer1 / 10;
       temp2 = integer1 % 10;
       printf("The first numbers digits are: %d\n",temp2);
      }
while (integer2>9)
      {
       integer2 = integer2 / 10;
       temp3 = integer2 % 10;
       printf("The second numbers digits are: %d\n",temp3);
      } */


system("PAUSE");

}

I'm puzzled as to what to do with the for loop as it most likely does the integer++ part,
but I can't get the sum because loop adds only the last number.

Another problem I'm having is with While loops ( don't mind their placement atm.).
I can't get the last digit.For example I write 169, it return 1 and 6.

Help appreciated.

[zhelih]

Try:

for (x = integer1;integer1 < integer2;integer1++);
    {
    sum += integer1;
    }

You should add numbers to sum, so take a sheet of papper and look what you are doing.

[Phanta]

Ok, everything's working now, I'll mark the thread as solved now. Here's the changes:

#include <stdlib.h>
#include <stdio.h>


int main()
{
int integer1; 
int integer2,temp; 
int sum,x; 

printf("Hello, this program calculates between intervals");
printf("\n","");
printf("Enter the first integer:\n");
scanf("%d",&integer1);
printf("Enter the second integer:\n");
scanf("%d",&integer2);
if (integer2<integer1) {
                       temp = integer1;
                       integer1 = integer2;
                       integer2 = temp;
                       }
printf("The beginning of the interval is: %d\n",integer1);
printf("The end of the interval is: %d\n",integer2);
sum = 0;
[B]for (x = integer1; x <= integer2; x++)
    {
         int help = abs(x);
         while (help>0) 
      {
       sum += help % 10;
       help = help / 10;
      }
    }
printf("The sum is: %d\n",sum);[/B]


system("PAUSE");

}