_OBJECT-ORIENTED SOFTWARE CONFIGURATION MANAGEMENT_
by Richard Harter


Example 1: The base version of a simple example program.

void  main(int argc,char *argv[])
{
        int sum,i;
    
        for (i=0;i<argc;i++)
        {
            sum += atoi(argv[i]);
        }
        printf("Sum = %d\n",sum);
}



Example 2:  Change A1 fixes a bug in initialization of a variable.

void  main(int argc,char *argv[])
{
---->       int   sum = 0;
---->       int   i;
Š    
            for (i=0;i<argc;i++)
            {
                sum += atoi(argv[i]);
            }
            printf("Sum = %d\n",sum);
}


Example 3. Change A2 is some compiler-dependent speed optimization.

void  main(int argc,char *argv[])
{
---->       register int   sum = 0;
---->       register int   i;
    
---->       for (i=argc; --i >=0; )
            {
                sum += atoi(argv[i]);
            }
            printf("Sum = %d\n",sum);
}



Example 4.  Change B1 modifies the function of the program to sum squares.

void  main(int argc,char *argv[])
{
            int   sum,i;
---->       int   k;
    
            for (i=0;i<argc;i++)
            {
---->           k    = atoi(argv[i]);
---->           sum += k*k;
            }
            printf("Sum = %d\n",sum);
}


Example 5.  Merge of path B with the first part of path A.

main(int argc, char *argv[])  
{
---->       int   sum = 0;
---->       int   i;
            int   k;
    
            for (i=0; i<argc; i++)
            {
                k    = atoi(argv[i]);
                sum += k*k;
            }
            printf("Sum = %d\n",sum);
Š}