[user02@FC4 Lesson09]$ cat -n add1_100.c

   1  #include <stdio.h>
   2
   3  int main(void)
   4  {
   5     int count;
   6     int total = 0;
   7
   8     for (count = 1; count <= 100; count++)
   9        {
  10           printf("Adding %d to %d", count, total);
  11           total = total + count;
  12           printf(" yields %d\n", total);
  13        }
  14
  15     return 0;
  16  }

[user02@FC4 Lesson09]$ gcc -o add1_100 add1_100.c
[user02@FC4 Lesson09]$ ./add1_100
Adding 1 to 0 yields 1
Adding 2 to 1 yields 3
Adding 3 to 3 yields 6
Adding 4 to 6 yields 10
.....
Adding 97 to 4656 yields 4753
Adding 98 to 4753 yields 4851
Adding 99 to 4851 yields 4950
Adding 100 to 4950 yields 5050