Reverse programming!

[djvk2013]

Shipping Widgets.

We can ship up to 10 widgets in boxes of three sizes:

A small box holds 4 widgets.
A medium box holds 6 and a large box 10.

Unused space in the box is filled with foam blocks
which are the same size as a widget.

Input the number of Widgets to ship: 4
A small box was used to ship 4 units.

Input the number of Widgets to ship: 8
A large box was used to ship 8 units.

Input the number of Widgets to ship: 5
A medium box was used to ship 5 units.

Input the number of Widgets to ship: 10
A large box was used to ship 10 units.

Input the number of Widgets to ship: 1
A small box was used to ship 1 units.

Input the number of Widgets to ship: 0


A total of 28 widgets were shipped, using
2 small boxes, 1 medium boxes, 2 large boxes,
and 6 foam packing blocks.

Press any key to continue . . .



That is the running program.
I understand the math, I just need help on the programming part of it.
How would we program something like this?
thanks!

[dancks]

pretend you're the computer: write out pseudocode as a line by line step of how you would try to do the problem. You're seriously not even trying, at least show us you tried to come up with a method to solve this. Even if you have no idea how.

Seriously I wish I had the discipline to write pseudocode when I started out. You'll be lightyears ahead if you train yourself to do that.

[djvk2013]

widgets:
A small box would be in the 1-4 range
a medium box would be in the 5-6 range
a large box would be in the 7-10 range
foam:
small box: 4-number entered
medium box: 6-number entered
large box: 10-number entered

how do i tell the computer which number represents which box and how do i have the computer keep track during the looping program?

[dancks]

Alright at least you broke it down:

int num_widgets=0;
printf("How many widgets do you need shipped?");
scanf("%d",&num_widgets);
int num_large_boxes,num_med_boxes,num_small_boxes = 0;
if(num_widgets<=4)
{
       num_small_boxes=1;
       printf("One small box was used\n");
       printf("%d blocks of foam were used.\n",4-num_widgets);
}
else if(num_widgets<=6)
{
       num_medium_boxes=1;
       printf("One medium box was used\n");
       printf("%d blocks of foam were used.\n",6-num_widgets);
}
else if(num_widgets<=10)
{
       num_large_boxes=1;
       printf("One large box was used\n");
       printf("%d bloxks of foam were used.\n",10-num_widgets);
}
else
{
       num_large_boxes = num_widgets / 10;
       int num_rest = num_widgets % 10;
       //then the same if/else if/else:
       if((num_rest<=6)&&(num_rest>0))
       {
              num_medium_boxes=1;
              num_rest=num_rest-6;
       }
       if((num_rest<=4)&&(num_rest>0))
       {
             num_small_boxes=1;
             num_rest=num_rest-4;
       }
       int foam_used = (10*num_large_boxes) + (6*num_medium_boxes)+(4*num_small_boxes) - num_widgets;
       //do whatever
}
//maybe some other stuff 

I don't know if this will completely answer your question but there is enough there so you can research or figure out the rest.